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: 4


$(-\inf, -8]$

Work Step by Step

Since this graph has an arrow pointing to the left, the interval "starts" at negative infinity. Infinity is a concept, not a number, and so it cannot be included in the solution set. Therefore a parenthesis is used. The solution start ends at $-8$, and includes $-8$, so the right side of the notation has a bracket.
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