Answer
$x=-1$.
Work Step by Step
As $y=-|x|$ is symmetric with respect to $x=0$, for $y=-|x+1|$ the symmetric vertical line should be $x+1=0$ or $x=-1$.
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 2 - Graphs and Functions - 2.7 Graphing Techniques - 2.7 Exercises - Page 274: 44
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