Question

read the situations below and determine which relationship is not functional.
situation 1: a cell phone bill to the amount of minutes used
situation 2: the perimeter of a square to the length of one of the sides of a square
situation 3: the total amount of money charged monthly on credit cards to the number of credit cards owned
situation 3 does not represent a function.
this is because
a cell phone bill is unrelated to the amount of minutes used.
a given side length of a square could have a range of perimeters
the same number of credit cards can have different totals.

Explanation:

A function is a relation where each input has exactly one output. In Situation 3, the same number of credit cards can have different totals (i.e., one input - number of credit cards - can lead to multiple outputs - different money amounts). This violates the definition of a function.

Answer:

Situation 3