Answer
not a square screen.
Work Step by Step
Based on the given data, we can find the range in X-direction $\Delta X=X_{max}-X_{min}=5-(-5)=10$, the range in Y-direction $\Delta Y=Y_{max}-Y_{min}=4-(-4)=8$. As $\frac{\Delta X}{\Delta Y}=\frac{10}{8}=\frac{5}{4}$, the viewing rectangle is not a square screen.
