Write an equation of a line with a slope of 0 and passing through the point (5,4). Write an equation of a line with an undefined slope and passing through the point (-2,4). I know how to do this type of thing but these two questions have stumped me. If the slope of the first one is zero, it'll be a horizontal line. That means the equation will look something like this: y= some number right? If so, what do I do with the (5, 4)? Do I just graph that point and see where it is as far as y goes? If that's what I'm to do...*Looks at a graph* y= 4? Now that I think about it, I didn't need the graph so that either means it's really easy or really wrong.:rofl: As for the second one, if the slope is undefined it would be vertical and would look like this: x= some number. Would it be the same way, again, assuming I did the first one right? x= -2? EDIT: Write an equation of a line that passes through (9,-5) and (3,-5). The slope is 0/-6, right? Does that make it undefined or 0? I can't tell the difference. What if the answer was -6/0? Which would that be? As for writing the equation, it would be x or y, whichever it is according to whether it's undefined or zero...y/x = Aw, geez, I don't even know how to go about this one... Write an equation of a line that passes through the points (2,3) and (2,-6). slope = -9/0 I have two points...so, what I would do is...hm, would graphing them help me or not?