Find the equation of a parabola with a given focus and vertex.

[tsbg8185]

Homework Statement

Find the equation of a parabola with a vertex of (1,-3) and focus of (1,-1)?

Homework Equations

The Attempt at a Solution

 

[Char. Limit]

Have you tried anything?

 

[HallsofIvy]

The general formula for a parabola, http://en.wikipedia.org/wiki/Parabola, involves the coordinates of the vertex and the distance from the vertex to the focus. You are given one and can easily find the other.