Which is the axis of symmetry of a parabola with equation x^2=-4y?
x = –4
x = –1
x = 0
x = 1

The axis of symmetry is

Step-by-step explanation:

we know that

The equation of a vertical parabola into vertex form is equal to

where

(h,k) is the vertex of the parabola

and the axis of symmetry is the x-coordinate of the vertex

In this problem we have

The vertex is the origin

therefore

the axis of symmetry is

(-5,-28)

i graphed to on desmos.