Decide Whether the Relation Is a Function $$\{ ( - 2,4 ) , ( 2 , - 4 ) , ( 6 , - 6 ) , ( 9,7 ) , ( 12 , - 7 ) \}$$

Multiple Choice

Decide whether the relation is a function.
- $$\{ ( - 2,4 ) , ( 2 , - 4 ) , ( 6 , - 6 ) , ( 9,7 ) , ( 12 , - 7 ) \}$$

A) function
B) not a function