Exercise 69 Page 80

For a relation to be a function, each x-value can only be paired with one y-value, but one y-value can be paired with multiple x-values. In a mapping, the x-values in the domain can only point to one y-value in the range.

In the given mapping, we can see that at least one of the x-values corresponds to multiple y-values. Since not all of the values in the domain only point to one value in the range, the relation is not a function. Now, we can list the elements in the domain and range. Domain:& -5, 0, 2, 9 Range:& -3, -1, 5, 15