$(20$ points, $5$ each$)$ Can the following relationship be described as a function? Explain why.

The domain of functions is all students. Range can vary based on the function.

a$.$ The classes each student is enrolled in

b$.$ The number of classes each student is enrolled in

c$.$ Student's social security number

d$.$ The number of a bus assigned for each student in a field trip

Solution:

a$.$

b$.$

c$.$

d$.$