Find the exponential function f (x) = Cb if (-1, 2/3) and (1, 6) both lie on the graph of the function. Of (x) = 3(230 ) Of(x) = 2(3 2) Of (2) = 3(2 2) Of (x) = 2(62) Of(x) = 3(3 ) Of (a) = 2(3 ) O None of these