Answer:
y=3(0.8)x
Step-by-step explanation:
An exponential function is a function of the form;
[tex]y=ab^{x}[/tex]
The explanatory variable x is the exponent, a is the initial value and b the base of the exponential function.
The function is said to be an exponential decay function if the base is between 0 and 1;
0<b<1
Therefore, y=3(0.8)^x is the required function. The values of y become smaller as x increases.
