# 4: Exponential and Logarithmic Functions


In this chapter, we will explore exponential functions, which can be used for, among other things, modeling growth patterns such as those found in bacteria. We will also investigate logarithmic functions, which are closely related to exponential functions. Both types of functions have numerous real-world applications when it comes to modeling and interpreting data.

Thumbnail: The functions $$y=e^x$$ and $$y=\ln(x)$$ are inverses of each other, so their graphs are symmetric about the line $$y=x$$. Image used with permission (CC BY-SA; OpenStax).

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