,

Since the values are the same, use the equation of a parabola that opens left or right.

The distance from the focus to the vertex is . Subtract the coordinate of the vertex from the coordinate of the focus to find .

Subtract from .

Substitute in the known values for the variables into the equation .

Simplify.

Find the Parabola with Vertex (0,0) and Focus (-1,0) (0,0) , (-1,0)