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Suppose you want to use a Linear Approximation to approximate 1 without a calculator. V25.2 Which of the following functions and x-values would be best to use? O Use f (ac) = - and x = 9. O Use f (a) = a and a = 9. O Use f (a) = Vac and a = 25.1. O Use f (ac) = 2 2 and a = 25. O Use f (a) = Vac and ac = 25. O Use f (ac) = 2 2 and x = 25.1