--------------------------------- Find the slope of a line that is perpendicular to the line containing the points (-2, -1) and (2,-3). -------------
Thank you for your answer DJ-7809.
Hi LAPAPALLAJD,
I will try to explain how to do it manually.
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No, changed my mind, I will give you a different question and then you can do this one by yourself
Find the line that is perpendicular to (-8,3) and ( -1,-5)
gradient = rise / run = (-5-3) / (-1--8) => -8 / (-1+8) => -8 / 7
The gradient (slope) of the perpendicular line is the negative reciprocal that is = +7 / 8
Over to you.