How can you determine if an exponential equation represents exponential decay

Exponential functions are written in the form:

To determine if this is exponential decay, you need to look at the b value. If that value is greater than zero and less than one, so in between, than your function is exponential decay.

Example:

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5