What is exponential growth?
Exponential growth is when the growth of something where the size of growth depends on the size of the amount already present. The bigger the original value, the more the increase or growth.
How can we see this with bacterial growth?
Here you can easily see and understand the concept of exponential growth. As you watch the video of these bacteria, you can see that the more bacteria there are, the more bacteria are reproduced through binary fission.
What is exponential decay?
The same goes for exponential decay, except exponential decay is the opposite of growth, and the size rapidly decreases rather than increases.