Analytical geometry, finding the focus of the parabola?

Question

I think I figured there is 2 formulas to find the focus of a parabola.
One is h + p , k

and the other is

h, k + p

how do I know when to use which one,
ahhhhhhh help.
thanks

Answer 1

For a parabola with vertex (h, k) the focus is:

For a vertical parabola: (h, k + p)

For a horizontal parabola (h + p, k)