Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.1 - Algebraic Expressions, Real Numbers, and Interval Notation - Concept and Vocabulary Check - Page 12: 14


Less than or equal to -1

Work Step by Step

A negative infinity at the start of an interval indicates that the interval contains all numbers less than the number at the other endpoint of the interval. The other end of the interval is -1, and it has a square bracket. The square bracket indicates that the interval includes -1. Therefore, the interval contains all numbers less than or equal to -1.
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