# parabola equation forming

*label*Mathematics

*timer*Asked: May 15th, 2015

**Question description**

How do i form an equation for a parabola with the vertex at (4.5, 6) and the focus at (4.5, 4.5)? I'm not sure about either equations:

y-k=a(x-h) squared or x-h=a(y-k) squared. i don't know what "a" is supposed to be or "x" and "y".