Slopes of Vertical and Horizontal Lines
 There are two acronyms that can be very helpfulwhen dealing with slopes of vertical and horizontallines. There are two acronyms that can be very helpfulwhen dealing with slopes of vertical and horizontallines.VNOX and HOY There are two acronyms that can be very helpfulwhen dealing with slopes of vertical and horizontallines.VNOX and HOYWhat strange little words...let's see how they help! VNOXNO -V - X -Their equation is in the formx = a constantVertical LinesHave no slope or undefined slope HOYH -O -Y - Their equations are in the formy = a constant.Horizontal LinesHave slope  = 0 Now, using these acronyms,let's take a quiz! undefined?What are the slopes of the following lines?yx0?yx What is the slope of the line y=-3?Undefined0-3 What is the equation of a line that passes through the point (5,-5) and has an undefined slope? x = 5x + y = 5y = -5y = 5x + 5 What is the slope of the line that is parallel to x = 0?0Undefined1None of the above. What is the slope of the line that is perpendicular to x=5?0UndefinedNot enough information to answer. What is the equation of the line that has slope=0 and passes through (-2,-5)?y=-2x=-2y=-5x=-5 What is the slope of the line x=-8?Undefined0-8 What is the slope of the line parallelto y=8?0Undefined8 What is the slope of the line perpendicularto y=8?0Undefined8
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