$[1, 2]$ Refer to the image below for the graph.
Work Step by Step
The inequality has $\le$ on the left so a bracket will be used. The inequality has $\le$ on the right so a bracket will be used. Thus, the equivalent interval notation of the given inequality is: $[1, 2]$ To graph this interval, plot solid dots at $1$ and $2$, then shade the region in between. (refer to the attached image in the answer part above)