What is the standard form of an exponential function

An exponential function is a function in which the independent variable is an exponent. Exponential functions have the general form y = f (x) = ax, where a > 0, a≠1, and x is any real number. The reason a > 0 is that if it is negative, the function is undefined for -1 < x < 1.

Divide 40%5 and your answer is 8

Ithink it’s b, hope this .