Question

Which of the following lines is perpendicular to the line y=-2

A.) y=1/5x+3
B.) y+3=-5(x+2)
C.) y=2
D.) x=-2

Answer 1

D, x = -2

Explanation:

The slope of y = -2 is 0, because it is horizontal. The perpendicular slope of a horizontal slope is a vertical, which has x equaled to a number. The answer is D, x = -2, because its slope is undefined, or vertical. This makes it perpendicular to 0, or horizontal.