Question

Does the set of ordered pairs {(5, 13), (6, 12), (7, 11), (9, 9), (10, 11)} define a function?

Answer 1

Yes, the set is a function

Explanation:

In order to have a function, each x must pair up with exactly ONE y

That happens in this set of ordered pairs.

5 only pairs with 13

6 only pairs with 12

7 only pairs with 11

9 only pairs with 9

10 only pairs with 11