Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 3 - Quadratic Functions - Review Exercises and Problems for Chapter Three - Page 130: 19

Answer

$ y=\frac{7}{9}\cdot(x-3)^2-5$

Work Step by Step

The vertex form of the parabola is $y=a(x-3)^2-5$ and if $x=0, y=2$, so $$ \begin{aligned} a(0-3)^2-5 & =2 \\ 9 a & =7 \\ a & =\frac{7}{9} \end{aligned} $$ Hence $$ y=\frac{7}{9}\cdot(x-3)^2-5.$$
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