Find f-1(x) for the following one-to-one function f.f = {(-7, 3), (-1, 1), (6, 2), (8, 4)}
A. f-1 = {(-3, 7), (-1, -1), (2, -6), (4, -8)}
B. f-1 = {(7, -3), (1, -1), (-6, -2), (-8, -4)}
C. f-1 = {(-3, 7), (-1, 1), (-2, -6), (-4, -8)}
D. f-1 = {(3, -7), (1, -1), (2, 6), (4, 8)}
Answer: D
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