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)

What is the value of a?

−7.5
−4
4
7.5

1 answer

-7.5

Since the zeros are -5 and -3, the equation in factored form will be y = a(x+5)(x+3). Plugging in the point (0,60), we get:

60 = a(5)(3)
60 = 15a
a = 60/15
a = -4

So, the value of a is -4.