The equation below describes a parabola. if a is negative, which way does the parabola open? y=ax^2 a. down b. left c. up d. right

Given equation : y=ax^2 
Taking a to the other side we have, x^2=(1/a)*y
 This equation describes a parabola that opens up.
 When a is negative, the focus is on the negative y-axis, therefore, the parabola opens down.
 The answer is a. down.

Don’t worry about it