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 5 - Trigonometric Functions - Section 5.3 Properties of the Trigonometric Functions - 5.3 Assess Your Understanding - Page 420: 138

Answer

See graph (red). vertex $(3,5)$, axis of symmetry $x=3$.

Work Step by Step

1. Given $f(x)=-2x^2+12x-13=-2(x^2-6x+9)+5=-2(x-3)^2+5$, we can obtain its graph from $y=x^2$ by shifting the curve 3 units to the right, stretching vertically by a factor of 2, reflecting across the x-axis, then shifting 5 units up. See graph (red). 2. We can find its vertex $(3,5)$, axis of symmetry $x=3$.
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