Answer
$\left\{x|-3 \le x \le 1\right\}$
Refer to the attached image for the graph.
Work Step by Step
A bracket on the left means that $-3$ is included in the set.
A bracket on the right means that $1$ is included in the set.
Therefore, the set-builder form of the given interval is:
$\left\{x|-3 \le x \le 1\right\}$
To graph the interval, plot a solid dot at $x=−3$ and a solid dot at $x=1$, andthen shade the region between them.
(refer to the attached image in the answer part for the graph)
