Question

Which of the following scenarios exhibits a function relation? Take the first set listed to be the domain of the relation.
a. the set of tree heights and the set of trees in a forest
b. the set of car make and models and the set of people in a certain town
c. the set of birthdays and the set of students in a class
d. the set of people with Social Security cards and the set of Social Security numbers

Answer 1

D. The set of people with Social Security Cards and the set of Social Security numbers. 
Is the scenario that exhibits a function relation.

A function is a set of ordered pairs wherein each x-element has only ONE y-element associated with it.

Choice D is a function because only one person corresponds to a single specific social security number.