Question

The expressions below represent either exponential growth or exponential decay. Check all the expressions that represent exponential decay.

5^x
3(0.75)^2t
35(2.4)^x
5000(1.04)^3t
0.05^x
500(0.005)^t

Answer 1

Answers B, E and F (1, 5 and 6).

Explanation:

In an exponential equation, (y=ab^x), the "b" value must be a decimal less than 1 (but greater than 0) for it to be considered an exponential decay function. Only equations B, E and F have a "b" value that fits this criteria.