The curve through the ordered pairs 0 comma 10 , 1 comma 5 , and 2 comma 2 point 5 can be represented by the function f of x is equal to 10 times 0 point 5 to the x th power What is the multiplicative rate of change of the function?

In an exponential function of the form f(x) = a · b^x, the multiplicative rate of change is the base b. Here, f(x) = 10 · 0.5^x, so the multiplicative rate of change is 0.5. This matches choice A.

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