Question

someone help with this.. forgot how to do this: Perpendicular to y = -1/4x+2 contains (15,-8) .... i got y = -1/4x-68... is that right...? if not please explain how to do it... and all the steps

Answer 1

Perpendicular line has a slope of -1/m of the original line. In this case, m = -1/4. So, the perpendicular line has a slope of 4.

The line equation will be:
y = 4x + b.

Since it passes through 15, -8, you can find b and the line equation.

Answer 2

Yeah i know that..

look this is how i did it: -8 = 4/1(15)+b

-8=60+b
-60 -60
__________
-68 = b

So for my final answer ... when we put it in y = mx+b form.. would it be y = -1/4x - 68 OR y = 4x - 68 ??