Question

Suppose f(x) = ab^x is an exponential GROWTH function. Which function, then, represents exponential DECAY?

Answer 1

f(x) = ab^x
It is the same function. In the case of growth, b represents a number greater than zero, but in decay, it represents a number between 0 and 1.

Answer 2

`a \\eq 0`,
`b > 1` and
`r < 0`, where
`x' = r\cdot x`.

Explanation:

An exponential growth function that represents exponential decay has
`a \\eq 0`,
`b > 1` and
`r < 0`, where
`x' = r\cdot x`.