Question

PLEASE HELP ASAP!!!!!!!!!!!!!!!

Answer 1

The narrowest parabola will be the one with the greatest magnitude of acceleration...y, dy/dx, d2y/dx2 for each are:

-2x^2, -4x, -4

-x^2, -2x, -2

x^2, 2x, 2  and your fourth equation is the same as the third?

From what you have the first equation, -2x^2, will be the narrowest because it has the greatest magnitude of acceleration |-4|=4

Answer 2

It would be the one with the number that is furthest away from 0 either negative or positive.  in this case it would be A