# What is the equation of the parabola with a focus at (15,-3) and a directrix of y= -4?

##### 1 Answer

May 18, 2016

Equation of parabola is

#### Explanation:

Here the directrix is a horizontal line

Since this line is perpendicular to the axis of symmetry, this is a regular parabola, where the

Now the distance of a point on parabola from focus at

Its distance from focus is

Hence,

or

or

or