Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 2 - Linear and Quadratic Functions - Section 2.4 Properties of Quadratic Functions - 2.4 Assess Your Understanding - Page 158: 67


(a) See graph (red curve). (b) domain $(-\infty,\infty)$, range $(-\infty,\infty)$. (c) decreasing on $(-\infty,\infty)$.

Work Step by Step

(a) To graph $y=-\frac{2}{5}x+4$, find two points on the line $(0,4),(5,2)$, then connect the points. See graph (red curve). (b) We can determine the domain $(-\infty,\infty)$, range $(-\infty,\infty)$. (c) The function is decreasing on $(-\infty,\infty)$, increasing on $none$.
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