Question

Choose all of the following equations that have a graph in which the parabola opens downward. More than one answer may be chosen.

A. y = 2x^2 + 2x + 8
B. y = −4x^2 + 8x − 19
C. y = 16x^2 + 2x − 4
D. y = −x^2 − 6x + 10

Answer 1

B,D
Negative coefficient of x^2 means parabola opens downward