# Example 2

- Author:
- Walch Education

A variable expense declines at a rate of 90% each day. The beginning balance is $80. After each day, the balance reaches 90% of the previous day. This behavior can be described by the set of ordered pairs in the table. Determine the key features of this function.

This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.