How do you determine if the equation #y = 2.1(0.15)^x# represents exponential growth or decay?
1 Answer
Apr 24, 2016
y decays as x increases..
Explanation:
Let
As x increases,,y is decreasing or increasing according as y' > or < 0.
For decay, y' < 0, when b > 0 and 0 < ln a < 1.#
Here,
So, y decays as x increases.
