The exponential function models exponential growth and has the unique property where the output of the function at a given point is proportional to the rate of change of the function at that point. The inverse of the exponential function is the natural logarithm which represents the opposite of exponential growth, exponential decay.

For a more detailed explanation see wumbo.net.

### Notes

e stands for Euler’s number. The number e is a famous irrational number, and one of the most important numbers in mathematics. The first digits of e are: 2.718281828459… e is the base of the Natural Logarithms, invented by John Napier.

### Dave Bruns

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