Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 8 - Section 8.4 - Nonlinear Inequalities in One Variable - Vocabulary, Readiness & Video Check: 3


$(-\inf, 0]$

Work Step by Step

Since the graph contains an arrow pointing to the left, this interval "begins" at negative infinity. Positive and negative infinity are not numbers, but ideas and therefore cannot be included in the solution set. A parenthesis is used with infinity. Zero is included in the solution set, and so a bracket is used.
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