Question

Which equation represents an exponential decay function

Answer 1

By definition, an exponential equation is of the form:

`y = A * (b) ^ x`
Where,
A: initial amount
b: rate of change
x: independent variable
y: dependent variable
For this case we have two options:
0 <b <1: the function decreases
b> 1: the function grows.
Therefore, an exponential function that decreases is:

`y = A * (b) ^ x`
Where,
0 <b <1
Answer:

`y = A * (b) ^ x`
0 <b <1