# Chapter 4 - Exponential Functions - 4.1 Introduction to the Family of Exponential Functions - Exercises and Problems for Section 4.1 - Exercises and Problems - Page 145: 13

-3.

#### Work Step by Step

Looking at the equation and matching it to the formula, we see that the grwoth rate $r$ is $2.31-1=1.31$, $a=.0022$, and $b=-3$.

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