Chapter 4 - Exponential Functions - 4.5 The Number e - Exercises and Problems for Section 4.5 - Exercises and Problems - Page 172: 1

The answer is below.

Recall, $e=2.71$. Also, remember the higher the number raised to the power is, the steeper the graph will be. Thus, we see that the steepest graph is $3^x$, the middle graph is $e^x$, and the shallow graph is $2^x$.