Refer to the image below for the graph.
Work Step by Step
RECALL: The graph of the equation $x=k$ is a vertical line. Every point on the line has the same x-value. Thus, to graph $x=0$, you can plot the points (0, 3), (0, -3), and (0, 0), and then you can connect them using a line. (Refer to the image in the answer part above.)