Question

The graph of a quadratic function is a parabola that opens down and has a vertex of (4,3) Which if the following could be the function?

Answer 1

B

Explanation:

To find the correct one plug in 4 into x and if you get 3, that's the correct one.

A. y(4) = -4^2 + 4*4 + 4 = -16 + 16 + 4 = 4 X

B. y(4) = -4^2 + 8 * 4 - 13 = -16 + 32 - 13 = 3