Answer
Refer to the graph below.
Work Step by Step
The graph of an equation in the form $x=h$ is a vertical line whose x-intercept is $(h, 0)$. All points on this line have an x-coordinate of $h$.
This means that the following points are on the line $x=3$:
$(3, -2)$, $(3, 0)$, and $(3, 2)$.
Plot the three points above then connect them using a line.
(Refer to the graph in the answer part above.)