Equations for line graphing

Question

Write the equation of a vertical line line passing through point Q (-6,3)

Answer 1

A vertical line means a constant value of x.

If the vertical line passes through the point (a,b) then its constant value of x is equal to a, the x-coordinate of the point. The equation of this vertical line is simply x = a.

So, if the point that the vertical line passes through is (–6,3) whose x-coordinate is –6, then the equation of this vertical line is

x = –6