F(x) = {(1, 4), (2, 3), (5, 8), (4, 7)} is f-1(x) a function and why? a - yes, each element in the range has only one domain value. b - yes, each element in the domain has only one range value. c - there are only a limited number of ordered pairs and can’t be determined. d - we don’t know the original function and therefore can’t make the determination. i know as a fact that the answer is yes, i'm confused on how to interpret it. my guesses are that it's a.