Answer
$y = 3+\frac{1}{2}~tan~x$
We can see the graph below.
Work Step by Step
$y = 3+\frac{1}{2}~tan~x$
When $x = -\frac{\pi}{2}$, then $y = 3+\frac{1}{2}~~tan~(-\frac{\pi}{2})~~$ (which is undefined)
When $x = -\frac{\pi}{4}$, then $y = 3+\frac{1}{2}~tan~(-\frac{\pi}{4}) = 2.5$
When $x = 0$, then $y = 3+\frac{1}{2}~tan~0 = 3$
When $x = \frac{\pi}{4}$, then $y = 3+\frac{1}{2}~tan~\frac{\pi}{4} = 3.5$
When $x = \frac{\pi}{2}$, then $y = 3+\frac{1}{2}~tan~\frac{\pi}{2}~~$ (which is undefined)
We can see the graph below.