## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

$[4,6)$ See the figure below.
Since the left boundary of the given inequality involves "less than or equal " and the right boundary involves "less than ", then the interval notation will have bracket on the left and a parenthesis on the right. Hence, the given inequality can be written as $[4,6)$. To graph, plot solid dot at $x= 4$ and a circle at $x=6$, then shade the region between them. See the figure below.