# How do you find the equation of the parabola whose Focus (0,-1/4) and directrix (0,1/4)?

##### 1 Answer

Nov 29, 2015

The **vertex** will lie halfway between the focus and directrix.

#### Explanation:

I think you meant to write that the directrix is **above** the focus, so this parabola **opens downward** (concave down).

**Vertex**

**Distance between focus and vertex**

Coefficient

The sign on **negative** , so

**Equation of parabola** :

hope that helps!