When I plot these points, they are neither parallel or perpendicular. The slopes are WX (2) and YZ (-2). What am I doing wrong?
Line WX contains (−1, 2) and (4, 12) Line YZ contains points (−5, 8) and (2, −6). Lines WX and YZ are
perpendicular because the slopes are the same
parallel because the product of the slopes is −1
perpendicular because the product of the slopes is −1
parallel because the slopes are the same

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is not supposed to be the points per se, is supposed to be the lines they make :S

I know. Sorry, that's what I meant.

By plot, I meant I plotted and connected them to their respective lines. That's how I got the slope.

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