Answer
$-6 \le x \le -\frac{1}{2}$
Refer to the image below for the graph.
Work Step by Step
A bracket on the left means $-6$ is included in the set.
A parenthesis on the right means $-\frac{1}{2}$ is not included in the set.
Thus, the equivalent inequality of the given interval is:
$-6 \le x \lt -\frac{1}{2}$
To graph the interval on a number line, plot a solid dot at $-6$ and plot a solid dot at $-\frac{1}{2}$. Then, shade the region between them.
(refer to the attached image in the answer part above)
