Answer: A. relation only
Step-by-step explanation:
A relation is defined as the correspondence of the Domain with the Range, so that each element of the Domain corresponds to one or more elements of the Range.
A relation is a function if for each input value (Domain) there is an unique output value (Range).
You can see from the graph that each input value (value x) has more than one output value (value y).
For example, note that for the value x = -4 there are two values of y. y = -1 and y = 5
Therefore based on this, you can conclude that:
It is a relation, but it is not a function.
