Answer
less than or equal to
Work Step by Step
The interval includes all numbers from negative infinity to -1, including -1 (the bracket is square, not round). That means it represents all real numbers less than or equal to -1.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.9 - Linear Inequalities and Absolute Value Inequalities - Concept and Vocabulary Check - Page 137: 3
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