Answer
$A.$
Work Step by Step
Axis of symmetry is parallel to the $x$ -axis, opens right.
According to Table 2,
Equation: $(y-k)^{2}=4a(x-h)\quad $
Vertex:$\quad (h,k)$
-----
$(h,k)=(0,0)$,
so look for $y^{2}=4ax\quad $.... choice $A.$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 7 - Section 7.2 - The Parabola - 7.2 Assess Your Understanding - Page 514: 18
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