#### Answer

Refer to the graph below.

#### Work Step by Step

Plot the point $(\frac{9}{4}, 2)$.
Use the slope to plot another point.
A line with an undefined slope is vertical.
All points on a vertical line share the same x-coordinate.
Since $(\frac{9}{4}, 2)$ is on the line, then the point $(\frac{9}{4}, -2)$ must also be on the line. Plot $(\frac{9}{4}, -2)$.
Complete the graph by using a line to connect the two points.
(Refer to the graph in the answer part above.)