Question 12 • Mathematics I
For an exponential function in the form f(x) = a · b^x, the multiplicative rate of change is the base b. Here f(x) = 2 · 5^x, so the multiplicative rate of change is 5. This also matches the values: 50 ÷ 10 = 5 and 250 ÷ 50 = 5. The correct choice is 5.
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