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 - 3.2 The Vertex of a Parabola - Exercises and Problems for Section 3.2 - Exercises and Problems - Page 128: 33

Answer

$ y=\frac{1}{4}\cdot(x-7)^2+3 $

Work Step by Step

We have $(h, k)=(7,3)$, and $y=a(x-7)^2+3$. Solve for $a$ $$ \begin{aligned} a(3-7)^2+3 & =7 \\ 16a & =4 \\ a & =\frac{1}{4} \end{aligned} $$ Hence $$ y=\frac{1}{4}\cdot(x-7)^2+3 $$
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