Question

does the following data represent a function?
x|-4 -2 0 4
y| 3 1 -1 3

Explanation:

Step1: Recall function definition

A relation is a function if each input (x-value) has exactly one output (y-value).

Step2: Check x-values

List all x-values: $-4, -2, 0, 4$. Each x-value appears only once, so each has exactly one corresponding y-value.

Answer:

Yes, the data represents a function.