# What is the equation of the parabola with a focus at (15,19) and a directrix of y= 20?

##### 1 Answer

Nov 24, 2015

The directrix is **above** the focus, so this is a **downward opening** parabola.

#### Explanation:

The vertex will lie exactly halfway between the directrix and the focus:

The **distance**

Here is the final equation:

hope that helped