The zeros of a parabola are -5 and -3. The point (0, 60) is on the graph as represented by the equation. 60=a(0+5)(0+3)
Answer
A
−7.5
B
−4
C
4
D
7.5
Explanation
Substitute the point’s x-coordinate, 0, into the equation: 60 = a(0 + 5)(0 + 3) = 15a. Divide both sides by 15 to get a = 4, so the correct choice is 4.
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