Chapter 9.3, Problem 79PE

To determine

The property when the parabola opens right, up, down, left in the Cartesian plane if the standard forms of the parabolic equation:

${\left(x-h\right)}^2=4a\left(y-k\right)$

And

${\left(y-h\right)}^2=4a\left(x-k\right)$, where $\left(h,k\right)$ is the vertex of parabola and $a$ is focus.