hello I need help determining if this relationship is a function

By definition, a relation is a function if each input value (x-value) has one and only one output value (y-value).
Given the values shown in the exercise, you can identify the following ordered pairs of the relation:
[tex](1,0),(2,0),(3,2),(4,4)[/tex]You can notice that each input value has a unique output value.
Therefore, you can conclude that the answer is: The relation is a function.