Question

Which of the equations below represents a line parallel to the y-axis?

OA. X=4
OB. X=-y
OC. x=y
OD. x=4y

Answer 1

A. x=4

Explanation:

The y-axis is a vertical line at x=0, so for a line to be parallel to x=0, x must equal another constant. Option A is the only option that has a constant.