A condition in which a quantity decreases at a rate that is proportional to the current value of the quantity
What is an exponential decay?
An exponential decay can be written as:
f(x) = A*(r)^x
Where 0 < r < 1.
Notice that the quotient between f(x + 1) and f(x) is:
f(x + 1)/f(x) = (A*(r)^(x + 1))/(A*(r)^x) = r
So, f(x + 1) is r times f(x), meaning that the quantity decreases at a rate that is proportional to the current value.
From this, we conclude that the correct option is D:
"A condition in which a quantity decreases at a rate that is proportional to the current value of the quantity"
If you want to learn more about exponential decays, you can read:
https://brainly.com/question/11464095
