Answer
Vertex = (2.5, 185)
X min = -5
X max = 10
Y min = -50
Y max = 190
Work Step by Step
$y=-4x^{2}+20x+160$
$a=-4, b=20$
$\frac{-(20)}{2(-4)} =\frac{-20}{-8} = 2.5$
$y(2.5)=-4(2.5)^{2}+20(2.5)+160 =-4(6.25)+50+160= -25+210=185$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 3 - Polynomial and Rational Functions - Exercise Set 3.1 - Page 345: 83
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