Answer:
(A)

Explanation:
Given the three points plotted on a coordinate plane
Let us consider the values in the y-axis i.e. f(x)
80, 20, 5
We notice that each succeeding term occurs by the division of the previous term by 4.
Precisely:

This is a geometric sequence where the:
First Term =80
Common ratio =

Therefore, the function which can be used to graph the geometric sequence is:
