Exponential decay is when an equation decreases exponentially. Exponential decay equations have a decay factor instead of a growth factor. For example, a chart with exponential decay might look like this:
X / 1 / 2 / 3 /4/5/6
Y/64/32/16/8/4/2
The equation for this chart would be Y= 64(1/2)^x. Whenever you find the numbers are getting smaller each time, you know that there is a decay factor. The decay factor in this equation is 1/2. The decay factor will always be a decimal/fraction. The initial value in this equation is 64.
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