Determine whether the function represents exponential growth, exponential decay, or neither. Explain. y = 161 (0.725) t

If it looks like this

y = 161 * (0.725) ^t then it's a decay. Reason: the base is under 1. Try a couple of values for t say 0,1,2

y = 161 * (0.725) ^0

y = 161

y = 161 * (0.725) ^1

y = 161 * 0.725

y = 116.7

y = 161 * (0.725) ^2

y = 161 * (0.5256

y = 84.63

You can see that the function is steadily getting smaller. Remember if the base is under 1 and more than 0 the function decays. If it is greater than 1 then the function grows.

Just to make sure we understand what I'm saying

0 < base < 1

y = a (base) ^power.