If the Function Is One-To-One, Find Its Inverse $$\{ ( 7,2 ) , ( 8,2 ) , ( 9,2 ) , ( 10,5 ) \}$$

Multiple Choice

If the function is one-to-one, find its inverse. If not, write ʺnot one-to-one.ʺ
- $$\{ ( 7,2 ) , ( 8,2 ) , ( 9,2 ) , ( 10,5 ) \}$$

A) $\{ ( 7,5 ) , ( 7,2 ) , ( 9,8 ) \}$
B) $\{ ( 2,7 ) , ( 5,2 ) , ( 9,8 ) \}$
C) $\{ ( 2,7 ) , ( 8,2 ) , ( 9,5 ) \}$
D) not one-to-one