Question

look at this table:
x | y
9 | 7
5 | 3
8 | 0
18 | 12
is this relation a function?
yes no

Explanation:

A relation is a function if each input (x-value) has exactly one corresponding output (y-value). In the given table, every x-value (9, 5, 8, 18) appears only once, meaning no x-value is paired with more than one y-value.

Answer:

yes