Determine whether the lines associated with the functions are parallel, perpendicular, or neither.
-f(x) = x - 6 f(x) = -x
A) Perpendicular
B) Parallel
C) Neither

Question

Quizplus · Accepted Answer

The slopes of the lines associated with the functions are 1 and -1 respectively. 
Two lines are perpendicular if and only if the product of their slopes is -1. 
1*(-1) = -1, so the lines associated with the functions are perpendicular.

Determine Whether the Lines Associated with the Functions Are Parallel