Perhaps the clearest and simplest introduction to the Exponential Function and its practical implications for the human species can be found in the lectures of Albert Bartlett, Emeritus Professor ...

You could use a computer to fit an exponential function to the data and measure how well it fits. But how about just turning an exponential function into a linear function?

Exponential growth is a pattern of data that shows greater increases with passing time, creating the curve of an exponential function.

The exponential function is all about growth, and growth follows a logical curve. It can be linear or exponential. Linear is what children do as they grow in weight.

As in [Entire slice regular functions, Springer, 2016] we define the ∗-exponential of a slice-regular function, which can be seen as a generalization of the complex exponential to quaternions.