Choose all of the following equations that have a vertex that is the maximum point of the parabola. More than one answer may be chosen.

y = −4x^2 + 8x − 19

y = −x^2 − 7x + 1

y = 8x^2 − 6x + 128

y = 3x^2 + 9x − 4

Question

Choose all of the following equations that have a vertex that is the maximum point of the parabola. More than one answer may be chosen.

y = −4x^2 + 8x − 19

y = −x^2 − 7x + 1

y = 8x^2 − 6x + 128

y = 3x^2 + 9x − 4

anonymous · Answer

1st and second both open downward, therefore the vertex will be the maximum point