Answer
Option $C$
Work Step by Step
The graph has:
no lower limit so infinity will be used;
an upper limit of $-6$. Since a bracket was used, $-6$ is included.
Therefore, the interval is: $\color{blue}{(-\infty, -6)}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 1 - Equations and Inequalities - 1.7 Inequalities - 1.7 Exercises - Page 158: 10
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