Question

The slope of the line that is perpendicular to 3x+y=8 is
A. one third
B. -one third
C. three eighth
D. -3
E.3

Answer 1

First put the equation into slope intercept form: y = mx+b

Then, to find the perpendicular slope, take the m value and find the negative inverse.

Ex. Say the slope is \[\frac{ 5 }{ 2 }\] the negative inverse would be \[\frac{ -2 }{ 5 }\] and that would be your perpendicular slope.