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.
- $f = \{ ( 6,2 ) , ( - 6 , - 2 ) , ( 6,0 ) , ( - 6,0 ) \}$

A) $f ^ { - 1 } = \{ ( 2,6 ) , ( - 2 , - 6 ) , ( 0,6 ) , ( 0 , - 6 ) \}$
B) $f ^ { - 1 } = \{ ( 2,6 ) , ( 6 , - 6 ) , ( 0,6 ) , ( 0 , - 6 ) \}$
C) not one-to-one
D) $f ^ { - 1 } = \{ ( 2,6 ) , ( - 2 , - 6 ) , ( 0 , - 6 ) , ( 0 , - 6 ) \}$