# Math Help - Describe the graph change

1. ## Describe the graph change

2. Hello, camherokid!

Describe at least two ways the graph changes as a changes.

. . y .= .½[e^{-x/a} + e^{x/a}]

The curve is called a catenary, which resembles a parabola.
Code:
       *          |          *
|
*         |         *
*        |        *
*      |      *
*   |   *
*
|
- - - - - - + - - - - - -
|

As |a| gets larger, the graph gets "wider".
. . There is a horizontal dilation.

As |a| gets smaller, the graph gets "narrower".
. . There is a horizontal compression.