If the Function Is One-To-One, List the Inverse Function by Switching

Multiple Choice

If the function is one-to-one, list the inverse function by switching coordinates or inputs and outputs.
- $$f = \{ ( 9 , - 5 ) , ( 4,17 ) , ( - 18,11 ) \}$$

A) $f ^ { - 1 } = \{ ( - 5,9 ) , ( 17,4 ) , ( 11 , - 18 ) \}$
B) $\mathrm { f } ^ { - 1 } = \{ ( - 5,9 ) , ( - 18,4 ) , ( 11,17 ) \}$
C) $\mathrm { f } ^ { - 1 } = \{ ( 9,17 ) , ( 9,4 ) , ( 11 , - 18 ) \}$
D) not one-to-one