Answer:
The decay factor has to be less than 1 but greater than 0.
Step-by-step explanation:
In mathematics, exponential decay describes the process of reducing an amount by a consistent percentage rate over a period of time. It can be expressed by the following formula:
[tex]y=a(1-b)^x[/tex]If a is positive and b is less than 1 but greater than 0, then is an EXPONENTIAL DECAY.