Which equation represents an exponential function with an initial value of 500?

An exponential function has the variable in the exponent, and its initial value is the value at x = 0. For f(x) = 500(2)^x, f(0) = 500 × 2^0 = 500. So the equation with an initial value of 500 is f(x) = 500(2)^x.

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