Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - Chapter Test - Page 323: 29



Work Step by Step

We already know $y$, $x$, $k$ and $h$ from the given vertex and point, so in order to get the quadratic function we need to find $a$... $y=a(x-h)^{2}+k$ $-10=a(1+3)^{2}-2$ $-8=a(4)^{2}$ $-8=16a$ $a=-\frac{8}{16}$ $a=-\frac{1}{2}$ Therefore the function is... $y=-\frac{1}{2}(x+3)^{2}-2$
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