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 (1,2, or 3) does not represent a function.

This is because..
(1. a cell phone bill is unrelated to the amount of minutes used.)

(2. a given side length of a square could have a range of perimeters.)

(3. the same number of credit cards can have different totals.)