Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 11 - Rational Expressions and Functions - 11-2 Multiplying and Dividing Rational Expressions - Practice and Problem-Solving Exercises - Page 676: 72


Answer A

Work Step by Step

The formula for the axis of symmetry and the x-coordinate of the vertex is: $x=\frac{-b}{2a}=\frac{-3}{2.2}=\frac{-3}{4}=-0.75$ To find the y-coordinate of the vertex, substitute the value for x into the equation and solve for y: $y=2(-0.75)^2+3(-0.75)-1$ $y=-2.125$ The correct answer is A.
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