Question

identify whether each set of ordered pairs is a function or is not a function. {(1,3), (2,5), (4,9), (4,13)}

Explanation:

Step1: Recall function definition

A function requires each input (x-value) to have exactly one output (y-value).

Step2: Analyze x-values in pairs

The set has ordered pairs $(1,3), (2,5), (4,9), (4,13)$. The x-value $4$ maps to two y-values: $9$ and $13$.

Answer:

Not a function