Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Review - Page 830: 43

Answer

Vertex: (0,0) Axis of Symmetry: x=0 graph opens upward

Work Step by Step

To find the Vertex of the equation H(x)= 2x^2, you must find your A, B, and C values. The A=2. And since we don't have a B or C value, they both equal 0. To find the x value of the vertex, use the formula x= -B/2A. so... x= -0/2(2) x= 0/4 x= 0 Now plug the x you just found into the equation for the x value. h(0)= 2(0)^2 h(0)= 0^2 h(0)= 0 so the vertex is (0,0) To find the axis of symmetry you also use x= -B/2A x= -0/2(2) x= 0/4 x=0 so the axis of symmetry is x=0. In order to graph the equation, we must find two more points. Any number can be plugged into the equation, but I'm going to use 1 and -1. So.. 2\times(1)^2= h(1) 2\times1= h(1) 2= (h1) so (1, 2) will be a point on the graph. 2\times(-1)^2= h(-1) 2\times1= h(-1) 2= h(-1) so (-1, 2) will be the last point on the graph. The graph will open upward because the A value of the equation is greater than 0
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