#### Answer

See the explanation

#### Work Step by Step

a. The picture provided is a graphical representation of the data. So the representation is graphical
b. The horizontal axis on the graph is always the input and the vertical axis is the output. So we can look at the graph and see that the input description is the investment's performance, while the output description is years since 9/1/2000. Also by looking at the graph we see that the input's units are years, while the output units are dollars.
c. The relation is a function because each X value (years) only has one Y value (dollars).
d.
t years
↓
Rule f
↓
f(t) dollars