Which equation represents a parabola that has a focus of (0 0) and a directrix of y = 2

1. x^2 = - (y-1)
2. x^2 = -4y
3. x^2 = -y
4. x^2 = -4 (y-1)

ANSWER

EXPLANATION

Since the parabola has the (0, 0) and the directrix at y=2.

The equation is of the form

where (h,k) is the vertex.

The vertex is half way between the directrix and the focus.

The vertex will be at (0,1)

and is the distance from the vertex to the focus which is 1.

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

answer. d.289 hope that