# How do you find an equation that models a hyperbolic lens with a=12 inches and foci that are 26 inches apart, assume that the center of the hyperbola is the origin and the transverse axis is vertical?

##### 1 Answer

Apr 17, 2017

The process in described in the explanation.

#### Explanation:

Here is the equation of a hyperbola with a vertical transverse axis:

We are given that the center is the origin; this means that

We are given that

We are given that the foci are 26 inches apart; this means that the focal length is 13: