Question

Choose all of the following equations that have a graph in which the parabola opens downward. More than one answer may be chosen. (2 points)
y = 2x^2 + 2x + 8
y = −4x^2 + 8x − 19
y = 16x^2 + 2x − 4
y = −x^2 − 6x + 10

Answer 1

i know as one but im not sure if theirs another

Answer 2

*a is