Question

does the following data represent a function?
x| 2 0 2 5
y| 1 -3 1 22
yes
no

Explanation:

Step1: Recall function definition

A function maps each input $x$ to exactly one output $y$.

Step2: Check $x$-value repeats

The $x$-value 2 appears twice, paired with $y=1$ both times.

Step3: Verify unique output rule

Each $x$ has only one corresponding $y$ (no $x$ maps to different $y$s).

Answer:

Yes