Which of the following is a logarithmic function? A. Y=0.25X B. Y=x^0.25 c. y=log25^x d. y = (0.25) ^x

I think the answer is C, y = log 25^x. Logarithmic functions are inverses of exponential functions. the inverse of exponential function y = a ^x is x = a^y. The logarithmic function y = logaX, is defined to be equivalent to the exponential equation x = a^y.