This post is about section chapter 3 section 3 and we learned about finding slopes and finding the perpendicular slope to the original line's slope.


The picture above shows how to find the slope with two given points. Now to find the slope of the line perpendicular to the original one. You simply get the opposite of the slope.
Examples: Original, 3 Perpendicular, -3 Original, 1/3 Perpendicular, -3/1=-3