Question

What is the form of an exponential function?


y equals b subscript x


y equals b x


y equals x to the power of b


y equals b to the power of x

Answer 1

What makes an exponential exponential is that the exponent is the variable.  So unlike polynomials that have $x^2$ and $x^5$ in them, polynomials are switched and have the base as a fixed number and the variable as the exponent: $y=b^x$.

The last answer, y equals b to the power of x, is the best, from this list of options.