Answer
$x<-1$ or $x \geq 4$
Work Step by Step
Since the point -1 is not included and the point 4 is included, this graph represents $x<-1$ or $x \geq 4$.
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 2 - Functions - 2.3 Piecewise-Defined Functions - Exercises and Problems for Section 2.3 - Skill Refresher - Page 88: S6
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