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: 63

Answer

(a) See graph (red curve). (b) domain $(-\infty,\infty)$, range $(-\infty,2]$. (c) increasing on $(-\infty,3)$, decreasing on $(3,\infty)$.

Work Step by Step

(a) To graph $y=-2(x-3)^2+2$, start from $y=x^2$, shift the curve 3 unit(s) to the right, stretch vertically by a factor of 2, reflect across the x-axis, then shift 2 unit(s) up. See graph (red curve). (b) We can determine the domain $(-\infty,\infty)$, range $(-\infty,2]$. (c) The function is increasing on $(-\infty,3)$, decreasing on $(3,\infty)$.
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