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 ✓ does not represent a function.
this is because

Explanation:

Step1: Recall the definition of a function

A function is a relation where each input has exactly one output.

Step2: Analyze Situation 1

For a cell - phone bill to the amount of minutes used, each number of minutes (input) has a unique cell - phone bill (output). So, it is a function.

Step3: Analyze Situation 2

The formula for the perimeter \(P\) of a square with side length \(s\) is \(P = 4s\). For each value of \(s\) (input), there is a unique value of \(P\) (output). So, it is a function.

Step4: Analyze Situation 3

When considering the total amount of money charged monthly on credit cards to the number of credit cards owned, a single number of credit cards (input) can have multiple total amounts (outputs) depending on spending habits. So, it does not represent a function.

Answer:

Situation 3