Question

If the equation of m is given by y= ax + c, which of the following represents the perpendicular slope to m?

Answer 1

Answer: A. - 1/a

Step-by-step explanation:

Two lines are said to be perpendicular if the product of their slope equals -1 . That is , if the slope of the first line is $m_{1}$ and the slope of the second line is $m_{2}$ , if they are perpendicular , then :

$m_{1}$ x $m_{2}$ = -1.

Therefore : the perpendicular slope to m is $\frac{-1}{a}$