## Calculus with Applications (10th Edition)

The interval notation of the given expression is: $(-\infty,-9)$. Refer to the image below for the graph.
The inequality includes all numbers that are less than $-9$. Thus, the interval notation of the given expression is: $(-\infty,-9)$. To graph the inequality, plot a hole (hollow dot) at $x=-9$, then shade the region to its left. (refer to the attached image in the answer part above)