Question

PLEASE HELP !
Choose all of the following equations that have a graph in which the parabola opens downward. More than one answer may be chosen
y = 2x2 + 2x + 8

y = −4x2 + 8x − 19

y = 16x2 + 2x − 4

y = −x2 − 6x + 10

Answer 1

Use the following
\[
y= a x^2 + b x +c
\]
If a>0, it opens up.
If a<0, it opens down.

Answer 2

So 2 and 4

Answer 3

Thank you

Answer 4

A quadratic equation has an x-squared term.

Sometimes

Always

Never