We have two sets from which we get the coordinates of the ordered pair. We know that a set of ordered pair is called a relation, and that the set from which the first coordinate comes from is the domain while the set where the second coordinate comes from is called the range.
Thus, the given set is a relation.
Also we know that there are special kinds of relations--those whose first coordinate only has one corresponding second coordinate. They are called functions.
In this set, -6 corresponds to 3, 0 corresponds to 7, and 6 corresponds to 5. There is a one-to-one relation.
Therefore, this set is also a function.
The answer is the second option--it is both a function and a relation.
