Question

Find an equation for a line Perpendicular to
y=-1/4x + 2 that contains (15,-8)

-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 ??

Answer 1

Perpendicular line has slope of 4.
So, the line is:
y = 4x + b

Passing through (15, -8). So, b = -8-60 = -68.
So, line is:
y = 4x-68.

Answer 2

oooh ok so the slope never remains the same after u change

Answer 3

Parallel lines have same slope. So, m1 = m2.

Answer 4

thank u

Answer 5

Sorry, perpendicular lines have product of slopes as -1. m1*m2 = -1