3. Diego's club earns money for charity when members of the club perform community service after school. For each student who does community
service, the club earns $5. There are 12 students in the club.
The total dollar amount earned, E, is a function of the number of
members who perform community service, n.
a. Is 5 a possible input value? Why or why not?

domain = 12 students

Range = $60

Step-by-step explanation:

Given that the total dollar amount earned, E. Is a function of the number of members who perform communityservice, n

That is

E(n) = 5n

Since the club earn $5 on each student who does community service, 

Domain is independent variable n

While range is dependent variable E

Domain is therefore = 12 students

Range = 12 × 5 = $60