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The point (3, 18) is on the parabola y = ax2. What is the value of a? A. 9 B. 2 C. -9 D. -2

The point (3, 18) is on the parabola y = ax2. What is the value of a? A. 9 B. 2 C. -9 D. -2
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The point (3, 18) is on the parabola y =

ax2. What
is the value of a?
A. 9
B. 2
C. -9
D. -2

asked
User Xiaokaoy
by
8.0k points

1 Answer

4 votes

Answer:


y = {ax}^(2) \\ 18 = (a * {3}^(2) ) \\ 18 = 9a \\ a = 2

answered
User Ruchir Shukla
by
7.9k points
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