College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 3 - Section 3.4 - Library of Functions; Piecewise-defined Function - 3.4 Assess Your Understanding: 4

Answer

$(-\infty,0)$

Work Step by Step

We know that $f(x)=x^2$ is decreasing during the interval $(-\infty,0)$ because it is a standard parabola, centered at (0,0) -- it decreases from $-\infty$ to 0 and increases from 0 to $+\infty$.
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