Calculus with Applications (10th Edition)

Published by Pearson
ISBN 10: 0321749006
ISBN 13: 978-0-32174-900-0

Chapter R - Algebra Reference - R.5 Inequalities - R.5 Exercises - Page R-21: 5

Answer

The interval notation of the given expression is: $(-\infty,-9)$. Refer to the image below for the graph.
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Work Step by Step

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)
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