The reason behind this is that the standard is so well-known that it would take a central change for everyone to adopt a different format.
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In consequence, every DDP is unique and involves a degree of uncertainty (Eckert and Clarkson 2010). The following paragraphs introduce these interrelated issues and outline how process models can help to address them, before moving on to discuss this article’s contribution.įirst, considering novelty, “design processes seek to do something novel, once, whereas many other business processes seek to do the same thing repetitively” (O’Donovan et al. In particular, the DDP tends to involve significant elements of novelty, complexity, and iteration. The models we consider are motivated by, and aim to address, certain characteristics of the DDP that distinguish it from many other processes. This article aims to summarise the current thinking in the area by providing an up-to-date overview of DDP models, and by developing an organising framework that positions them in relation to one another. Furthermore, the many models that have been developed are diverse in focus and formulation. However, the complexity is such that no single model can address all the issues. Researchers have developed numerous process models to understand, improve, and support the DDP considering its particular characteristics. In comparison to many other processes, the design and development process (DDP) is especially challenging to navigate and manage. It may also be of interest to practitioners and educators seeking an overview of developments in this area. Overall, the article should aid researchers in positioning new models and new modelling approaches in relation to state-of-the-art. Finally, key characteristics of design and development process models are discussed considering their applications in practice, and opportunities for further research are suggested. It is demonstrated that the framework integrates coverage of earlier reviews and as such provides a new perspective on the literature. Their contexts, advantages, and limitations are considered through discussion of selected examples. The main categories of model are introduced. This article contributes an organising framework that clarifies the topology of the literature on these models and thereby relates the main perspectives that have been developed. Many models of the design and development process have been published over the years, representing it for different purposes and from different points of view. The padlocks are connected to the Hidden Object aspect of the game. Arranged across the bottom of scenes are a series of padlock icons representing the tasks that need to be completed for the current scene. Occupying the lower right corner is the rechargeable Hint feature. In the top left corner are short cuts to the game's main menu and general Help feature for the current situation. Overlaid on the individual scenes are various items. The game was developed when screen sizes were smaller and so you have to put up with black columns running down either side of the current scene. While there is plenty of dialogue between Nelly and the other characters, this only occurs in text format appearing at the bottom of the screen.Īlthough I mentioned earlier that the game can be viewed in full screen mode, this is not exactly true. As the game progresses, there are several meeting between Nelly, Tommy, their grandmother, in ghostly form, plus a professor and an old fisherman. This video sequence, presented in letter-box format, encourages Nelly, with assistances from her younger brother Tommy, to set out on a series of exploration missions to follow various clues to encounter other characters and find the missing pirate treasure. Treasure Seekers 1 opens with a sequence regarding a regular dream Nelly has about pirate treasure and her grandmother. Options are available to adjust the volume levels for background music and sound effects while the game can be viewed in full screen mode with a custom cursor. Profiles can be created so that different players can join in the fun of puzzle solving and searching for items. The second game in the series, Treasure Seekers 2, subtitled The Enchanted Canvases, deals with the same two characters but several years older.īoth of the Treasure Seeker titles have been developed by Artogon Games and belong to the Hidden Object genre. In Treasure Seekers 1, subtitled Vision of Gold, the siblings, named Nelly and Tommy, are two young children in search of pirate treasure that they believe their pirate grandmother had secreted away. Look around the room you’re in now and name 5 things you see, where the quantity is one. Una silla (a chair) -> unas sillas (some chairs) Una casa (a house) -> unas casas (some houses) Un libro (a book) -> unos libros (some books) Un bus (a bus) -> unos buses (some buses) Let’s take the above nouns and make them plural: Unos and unas are used to describe an unspecified quantity of something, in the same way as we use the word “some” or “a few” in English. ❽ónde está la salida? Hay una a la izquierda y otra a la derecha.Una de mis hijas empieza la escuela este año.Un goes before masculine nouns ( un hombre, un perro), while una goes before feminine nouns ( una mujer, una casa). Note that in both of the sentences above, the words un or uno would typically be emphasized- as in “ hay sólo uno“, or “ Hay sólo un tenedor“. A tip to remember: it shares the same root as the verb tener (to have). Now, what if you wanted to say “There’s only one fork”, what would you say?Īnswer: you’d say, “ Hay sólo un tenedor“ This is un tenedor. “ Oye amor, ¿cuántos tenedores ya están en la mesa?” But if multiple arrive, unos buses llegan. However, if you wanted to say “Look, there’s a bus coming now” you’d say This is because you are saying how many - without repeating the noun (bus). “❽ónde está el bus? Llevamos mucho tiempo esperando” [Where’s the bus? We’ve been waiting a long time” Here’s a scenario where you would say uno: Same thing for feminine words: depending on the context, una casa could be translated as one house or a house. So “ un libro” could be translated as one book or a book, depending on context. Note that Spanish doesn’t make a clear distinction between one and a/an like we do in English. Remember, we say un libro - not uno libro! Same thing goes if you’re talking about a book ( un libro), a keyboard ( un teclado), or a microphone ( un micrófono). Since momento is a noun, and it’s masculine, you drop the o. So when you’re doing math, or counting how many people are at the party, you’ll use uno, dos, tres, cuatro, cinco, etc.īut as soon as you introduce a person, place, or thing into the mix, it becomes un or una. The words un or una are used before nouns, exactly the same as we use a or an in English. The word uno is most often used for counting. Why do you say Un momento and not Uno momento? Why do you say Un momento and not Uno momento?.If you see a skull in a painting, for example, it’s most likely a memento mori. It literally means “remember that you must die.” The phrase is often used in the discussion of such objects depicted in works of art. The Latin phrase memento mori refers to an object that serves as a reminder of death or mortality. Sometimes, though, momento can refer to a warning or a reminder of something you’d rather forget. They can be old letters, photos-anything that reminds you of something you want to remember. Momentos aren’t always souvenirs or things that are bought. Momento often refers to things like souvenirs brought back from a trip, but the word often implies that they are special in some way, especially because they are a reminder of a special time in one’s life. But the original spelling memento (first recorded around 1400) is derived from the Latin mementō, which is a form of the verb meminisse, meaning “to remember.” (The words remember and memory have related roots.) As a variant of memento, it may have been influenced by the word moment ( momentos are often reminders of a moment in time). The spelling momento has been in use since at least the 1600s. Over two days we reached most of the big city sights by foot, even though we used our unlimited Metro 48 hour pass as much as we wanted. Pope Francis is an inspirational magnet for her. My wife is a reluctant traveler and a cheap airline ticket back to San Francisco departing from Rome FCO was the only way I got her to Rome for this visit after some serious attempts to plan a trip to Italy over the past 20 years. I changed our travel itinerary from Tallinn, Estonia to Rome for our last three nights in Europe to allow sightseeing for a couple of days in a city Kelley had never seen. In Poland, we watched Nigeria-Iceland while talking travel and politics with a British expat living in Norway. In Lithuania we talked with a former Russian soldier during the first World Cup match between Russia and Saudi Arabia. On Saturday we spent two hours talking with Karen and Graham during the England game. In Rome we saw Germany-Sweden World Cup qualifying match played Saturday night in The Good Fellas Pub, where we ate dinner seated adjacent to a couple of German women, both totally stunned by a 95th minute Germany win. Watching World Cup soccer in Europe was a blast with so many international connections made. No AC in this bar, but two Brits Karen and Graham were in Rome to see Pearl Jam. I want to return to Rome again when World Cup plus heat of day does not have us seeking a bar TV for hours at a time during the day to watch a game, drink a beer or two, while out of the sun, hopefully feeling a cooling air conditioner. Despite the summer heat and summer crowds this trip, she wants to return again to Rome when the weather is cooler. Same train 11:31am Sunday morning after most passengers exited at Ottaviano Metro Station for Vatican City.Įven more surprising about Rome to me is Kelley has said several times over the past two weeks how much she enjoyed being in Rome to finish off our June 2018 Europe trip. Metro A line through Central Rome 11:24am Sunday. Jump on the Metro or a bus when you want to be somewhere else or get back to your lodging neighborhood quickly. Walk when the weather is good and pick up public transportation when the weather is not. Walk or ride to a place you want to visit and then walk or ride towards other attractions along a route back to your hotel. Altare della Patria-Alter of the Fatherland (also site of Tomb of Unknown Soldier).Ĭheap public transportation at 1.50eur for bus or Metro makes Rome an easy city to travel place to place. Proximity of so many major city attractions like the Colosseum, Roman Forum ruins, Markets of Trajan, Alter of the Fatherland, the Pantheon and Vatican City and many other attractions along a 3 or 4 mile route make any walk across the city an historical education opportunity. Temperatures were mostly 28C/82-83F, dry on our first day and more humid with a couple of brief, but heavy afternoon rain showers. The app works offline, so no data plan is needed when traveling abroad.Turned out Rome is a far more walkable city than I expected in late June. The app's navigation functions guide you from one attraction to the next. Each walk comes with a detailed tour map as well as photos and background information for the featured attractions. How it works: Download the app "GPSm圜ity: Walks in 1K+ Cities" from iTunes App Store or Google Play Store to your mobile phone or tablet. Not only that, but you can also create your own walk with the attractions that interest you most and even set your hotel as the walk's starting point! In all, we have prepared 18 self-guided walks for you to explore Rome, which cover everything from charming neighborhoods to famous fountains and squares, shopping and antique hunting. Go on a tantalizing Food Walk in Historic Rome or enhance your visit with a tour of the sites featured in "Roman Holiday", the classic film starring Audrey Hepburn and Gregory Peck. If you're in Rome to visit Vatican City, the smallest state in the world, we've picked out 10 places you can't miss out on. If you are visiting for the first time, enjoy its wealth of historic major landmarks with the the two Introduction Walks ( Walk I / Walk II). Welcome to Rome – a city of history, culture, gastronomy and beauty. it adjusts to market conditions and give good entries for a none greedy trader. It was his original intention to conduct a standard three-month review of Nexgenâ s T-3 Fibs Protrader. T3-Fibs software is a good trading software. The website is but I think the site might be down right now. Please assess your financial situation carefully. Discussion in Trading Software started by KiasuTrader, Jan 5, 2004. All speculation, including day trading with leveraged instruments, involves great risk as well as reward. Example trading plans and any trades taken during class by the educaor, any written and or video documentation is for educational purposes only. Nexgen does not provide trading signals “as a service” nor offer personalized trading advice. The more you participate and solicit feedback on your trade executions, the quicker you will fine-tune your plan and eliminate mistakes. Sharing pictures or your practice trading with the educational educator is vital. Nexgen encourages you to participate in class and begin trading on the simulator. Once you have acquired the necessary trading skills and confidence using a simulator, you should be able to trade live money confidently and profitably using any liquid market under every type of market condition. You will start by learning and trading the trend trade and hva line rules and fine-tuning your trade management on the simulator. This guide will give you an understanding of the work needed to achieve your financial objectives. During your demo, you will also learn the class structure and gain an overall mastery of the trend trade and HVA line entries. We will teach you the rules and patterns for the highest probability of winning trades, entry, and in-trade management. You must constantly assess the potential of winning based on the patterns taught by Nexgen. Trading consistently depends on accurately reading the Fibonacci, trigger lines, and divergence lines areas. and 31: F.You will learn to read your indicators, know which rules apply to each of the trade entries types.and 25: Determining Trend Direction Using L.and 19: Retracement Divergence - At key are.Trading consistently and accurately depends on reading Fibonacci areas, trigger lines and divergence correctly. Nexgen Software goal is to teach you how to read then trust your indicators, rules and apply those setups daily. and 17: With Bearish Divergence at resistan AugLearn to day trade Fibonacci using Nexgen’s T3 Fibs ProTrader software.and 15: Zero Line Rejection (ZLR) - A Zero Day trade Fibonacci using Nexgen's T3 Fibs ProTrader software.and 13: How to recognize a “weak” Macd.and 11: Macd BB Strength - When Macd BB dot.and 9: SMALL TRIGGER LINES- Notice the cha.and 6: Large Trigger Lines -The Large Trig.The solid red lines are resistance and the solid bluelines are support. This gives us a complete and accurate Fibonacci analysis, which isrepresented by red and blue lines. Our Fibonacci confluence areas are generated by 10 “synthetically built” highertime frames. Thesekey areas will be extremely reliable for determining potential Reversal points in themarket. The Beckley yard also provides log marketing services to GMO Renewable Resources for logs harvested from their 68,000 acre Highlands Forest property. and provides consistent wood flow to their paper mill located in Covington, Virginia. They are used as the road map for our trading. i got these from this file: - online file sharing and storage - download Nexgen T-3 Fibs ProTrader for TradeStaion ().rar. The Beckley yard is operated in conjunction with the MeadWestvaco Corp. Learning when to trade long and short from the software’s key stacked areas willgive you the highest reward, lowest risk trades possible.Levels generated by the T-3 Fibs ProTrader are as follows:Fibonacci Confluence Areas - These areas are very powerful clusters of Fibonacciratios that fall into a tight range. Terms and Terminology …………………………………(Pg 38-39)1īasic Indicator AreasThe T-3 Fibs ProTrader is the most powerful predictive indicator package availabletoday. Bar Patterns ABC's and Trend Tick CounterA. Bollinger Band Support and Resistance…………….……(Pg.12)F. Macd BB Weak Retracement in Trend …………….…….(Pg.11)E. Recognizing a Strong Macd Reaction to a Key Area….… (Pg.10)D. Fibonacci Confluence Areas…………………………….(Pg.2)B. Nexgen provides clients with a clear, easy-to-follow trading plan built around the T3 Fibs ProTrader Fibonacci-based software. T-3 Fibs ProTrader Guide Table of Contents1. Edu-Ware releases The Prisoner for the Apple II, loosely based upon the 1960s TV series of the same name.The mainframe game Rogue is written by Michael Toy, Glenn Wichman, and Ken Arnold, eventually spawning a crowded genre of Roguelike games.December – Infocom releases its first game, Zork (later called Zork I), which begins the Zork series.The first batch of games from Activision, all for the Atari VCS, hits stores: Dragster, Fishing Derby, Boxing, Bridge, and Checkers.Atari, Inc.'s port of Space Invaders becomes the killer app for the VCS and the first console title to sell a million copies.The multi-stage Phoenix sports one of the first video-game bosses: a purple alien in a mothership.Midway's Wizard of Wor is released, allowing two players to fight simultaneously in monster-filled mazes.In 1982 the Atari 2600 port ends up as Yars' Revenge. releases first-person 3D tank shooter Battlezone. The term platform game was still several years in the future. November – Universal releases Space Panic, the first game with platforms and ladders.It also features multi-directional scrolling. November – Namco releases Rally-X, the first game with a bonus round.November 12 – Stern Electronics releases Berzerk, with designer Alan McNeil's signature on the monitor glass of each cabinet.October – Nichibutsu releases the vertically scrolling Crazy Climber, the first video game with a climbing mechanic and an objective of climbing to the top of the level.releases the cold-war-inspired Missile Command. May – Stratovox from Sun Electronics is the first game with voice synthesis.It has the first gaming mascot character, established the maze chase genre, opened gaming to female audiences, introduced power-ups, and told a story through cutscenes. It becomes the highest-grossing game of all time. May 22 – Namco releases Pac-Man (originally Puckman in Japan).Mattel creates the original five-programmer Intellivision game design team, later nicknamed the Blue Sky Rangers in 1982 in a TV Guide interview.New companies: Broderbund, Bug-Byte, HAL Laboratory, Human Engineered Software, Mindscape, On-Line Systems, Sirius, Sir-Tech.It awards games released during 1978–1979, with Space Invaders winning the overall Game of the Year award. Electronic Games hosts the first Arcade Awards, the first video game awards ceremony.The following titles were the best-selling home video games in 1980. In Japan and the United States, the following titles were the highest-grossing arcade video games of 1980. The following titles were the highest-grossing arcade games worldwide in 1980. Home video games sell $464 million ( $1.53 billion adjusted for inflation) in the United States, with the Atari VCS leading the market with a 44% share.The arcade video game market in the US generates $2.81 billion in revenue ($9.24 billion adjusted for inflation).The Atari VCS (later called the Atari 2600) also grew in popularity with a port of Space Invaders and support from new third-party developer Activision. The year's highest-grossing video game was Namco's arcade game Pac-Man, while the best-selling home system was Nintendo's Game & Watch. 1980 saw the release of a number of games with influential concepts, including Pac-Man, Battlezone, Crazy Climber, Mystery House, Missile Command, Phoenix, Rally-X, Space Panic, Stratovox, Zork, Adventure, and Olympic Decathlon. Once you’ve bought the game you can play for as long as you want without paying a monthly subscription, and there are enough dungeons and quests already available to keep you busy for years. Or, if you already own the game, you can just upgrade with High Isle on its own for $29.99/£24.99. You can buy the base version of the game for $19.99/£15.99, or buy the High Isle Collection, which includes High Isle and all the previous chapters for $49.99/£42.99. And, of course, there are plenty of new quests to complete and dungeons waiting to be plundered. Other new features include a new deck-building card game that you can play to while away a few hours, and two new computer-controlled companions for players who prefer to go questing on their own. The latest chapter is High Isle, which takes you to the homeland of the game’s Breton race, and throws you into a story of political intrigue involving High Isle’s rival factions and a mysterious organization known as the Ascendent Order. me – also prefer its grittier graphical style to the Disney-esque cartoon graphics of WoW.ĮSO keeps its fans coming back year after year by releasing regular expansions – which it refers to as Chapters, as each new chapter brings a new story and a new series of quests to the game, as well as opening up new zones for you to explore. But, unlike WoW, you don’t need to pay a monthly subscription to play the game, which makes it great value for players who want to immerse themselves in hundreds of hours of quests and adventures in the game’s online world of Tamriel. But turn-based is the trend these days, and if my time in the early access game is anything to go by then you’ll find that the old Baldur’s Gate magic will soon tempt you in as you “gather your party before venturing forth” – just like the good old days!Īlong with World Of Warcraft, The Elder Scrolls Online – or ESO to its thousands of fans – is one of the few A-List MMO titles that still supports the Mac (sadly, we lost Guild Wars 2 a couple of years ago…). The decision to opt for turn-based combat might worry old-timers – like yours truly – who remember the terrific real-time-with-pause system of the original games. Fortunately, the game’s turn-based combat doesn’t require lightning reflexes and high-speed action, so you can still get by with an M1 Mac if you need to. However, we had to drop the resolution to just 1600×900 on our M1 iMac in order to get a playable 25fps, so an M1 Pro or higher might be better. The developers says that the game will run on an Intel Mac with a quad-core CPU and an AMD graphics card, or on most Macs with M1 or M2 processors. The 3D graphics really bring the game to life as you and your companions wade into combat, but the spectacular visuals do need a fairly fast Mac in order to run properly. So, along with other survivors from the crashed ship, you set out to try to find a cure and then quickly find yourself embroiled in a mysterious war between the Mindflayers and an assortment of enemy races – who won’t be fully revealed until the game’s launch in the summer. The ship is attacked by dragons, but you’re able to escape – only to find that a Mindflayer larva has been implanted inside your brain. Rather than the powerful, god-like being that you became in Baldur’s Gate II, the new game lets you start from scratch with an entirely new character, chosen from the traditional D&D selection of races and classes – humans, elves, dwarves, wizards, warriors and rogues – and you then awake to find yourself prisoner on a flying ship controlled by Mindflayers (a familiar villain from D&D lore). It’s not a true sequel as the story and the main characters are all new – set more than 100 years after BG2 – although it is still set in the famous Baldur’s Gate region from the popular Dungeons & Dragons table-top games (and – spoiler alert – some familiar faces do make a welcome reappearance). It’s actually been available in ‘early access’ on Steam since 2020, but the game finally has a firm release date for August 2023 so you can now dive in and test drive the early chapters of the game to prepare yourself for the arrival of the full game in just a few months time. However, the forthcoming Baldur’s Gate 3 brings the series well and truly up to date with slick 3D graphics and a vast adventure that looks set to match the epic scale of its predecessors. The original Baldur’s Gate games were classics of the RPG genre when the series was launched almost 25 years ago, but their 2D graphics haven’t aged well, despite an HD update in 2012. But for those who want to test the waters on their own, it’s possible to run a full node on your own hardware. Your best bet is to work with a blockchain consulting firm, such as BairesDev. There are a number of ways you and your business can get into bitcoin. Within that network are full nodes, which validate transactions (a transfer of value) and blocks (files that contain data pertaining to bitcoin) However, the use of bitcoin does require a network to work upon. bitcoin can be used with a number of organizations (such as booking hotels and purchasing goods and services). Each transaction occurs without a middleman being involved. Because it is decentralized, it doesn’t use a bank or a single administrator. Therefore, we provide defensive suggestions to mitigate similar threats in the future.Bitcoin is a form of decentralized cryptocurrency that was created in 2009. We believe this model will be highly attractive to botmasters and could pose a considerable threat to cybersecurity. CoinBot is a generic model that can be applied to different kinds of cryptocurrency networks. Furthermore, we propose a cleaning scheme to prevent commands from being permanently recorded in the blockchain, thereby decreasing the risk of channel exposure. As such, there is no need to run a cryptocurrency wallet application and hardcode a botmaster’s sensitive information in CoinBot, and the communications between the botmaster and the bots are hidden under legitimate HTTP/S traffic. Different from other cryptocurrency-based botnet, CoinBot utilizes Web2.0 services to achieve a dynamic addressing service for obtaining commands. CoinBot is characterized by low cost, high resilience, stealthiness, and anti-traceability. In this paper, we propose CoinBot, a novel botnet that based on the cryptocurrency networks. In addition, the commands embedded in transaction records can be easily traced, since the transaction records in a cryptocurrency network are usually publicly available. Most existing cryptocurrency-based botnets are bonded with the cryptocurrency client, which generates abnormal P2P traffic that can be easily detected and blocked. A variety of cryptocurrency-based botnets have been proposed and developed to utilize cryptocurrencies as new command and control (C&C) platforms. Finally, we also provide and discuss a list of potential countermeasures to detect LNBot and D-LNBot activities and minimize their impacts.Ĭryptocurrencies are a new form of digital asset and are being widely used throughout the world. We presented proof-of-concept implementations for both LNBot and D-LNBot on the actual LN and extensively analyzed their delay and cost performance. By utilizing Bitcoin's Testnet and the new message attachment feature of LN, we show that D-LNBot can be run for free and commands are propagated faster to all the C&C servers compared to LNBot. In contrary to the LNBot, the whole botnet formation phase is distributed and the botmaster is never involved in the process. We further improve on this design by introducing D-LNBot a distributed version of LNBot that generates its C&C servers by infecting users on the Internet and forms the C&C connections by opening channels to the existing nodes on LN. In the second layer, C&C servers further relay those commands to the bots in their mini-botnets to launch any type of attacks to victim machines. Specifically, LNBot allows botmaster's commands to be sent in the form of surreptitious multi-hop LN payments, where the commands are either encoded with the payments or attached to the payments to provide covert communications. In the first layer, the botmaster anonymously sends the commands to the command and control (C&C) servers through regular LN payments. Exploiting various anonymity features of LN, we show the feasibility of a scalable two-layer botnet which completely anonymizes the identity of the botmaster. In this paper, we first propose a new generation hybrid botnet that covertly and efficiently communicates over Bitcoin Lightning Network (LN), called LNBot. While various covert botnets were proposed in the past, they still lack complete anonymization for their servers/botmasters or suffer from slow communication between the botmaster and the bots. It is also called the gradient of a line. A higher slope value indicates a steeper incline. Slope of a Line In mathematics, the slope of a line describes its steepness, incline, or grade. txt file is free by clicking on the export iconĬite as source (bibliography): Slope Coefficient on dCode. The Slope Calculator is used to help you find the slope of the line through two points (Step by Step). Roof pitch on the form x:12 can be expressed in grades as. You can find the roof pitch in the form of x:12 like 4/12 or 9/12. The copy-paste of the page "Slope Coefficient" or any of its results, is allowed as long as you cite dCode!Įxporting results as a. Roof pitch is the slope created by the rafter. Here are the steps to follow for this point slope calculator: First, enter the value of X1. We are basically measuring the amount of change of the y-coordinate, often known as the rise, divided by the change of the x-coordinate, known the run. It’s a simple online tool you can use to solve for the slope by inputting specific values. To find the slope of a line, we need two coordinates on the line. Except explicit open source licence (indicated Creative Commons / free), the "Slope Coefficient" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or the "Slope Coefficient" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, or API access for "Slope Coefficient" are not public, same for offline use on PC, mobile, tablet, iPhone or Android app! Check your result using the slope calculator. If the product ( multiplication) of the slope coefficients of 2 lines is $ -1 $, then the 2 lines are orthogonal (perpendicular) Ask a new question Source codeĭCode retains ownership of the "Slope Coefficient" source code.
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