A set of all points equidistant form a fixed point, called the focus, and a fixed line, called the directrix.
The distance from the vertex to the focus.
Going up to the focus (upward facing parabola)
From the vertex, you go downward to face the focus (downward facing parabola)
(x-h)^2 = 4p(y-k)
Vertical Axis of Symmetry Equation
(y-k)^2 = 4p(x-h)
Horizontal Axis of Symmetry Equation