Arturo O. answered • 09/24/18

Experienced Physics Teacher for Physics Tutoring

Perpendicular means its slope is the negative reciprocal of the slope of the given line.

Given line:

m = 3

Perpendicular line:

m = -1/3

y = (-1/3)x + b

Use the given point to find b.

-5 = (-1/3)(6) + b

Solve for b and finish from here.