For the scatterplot below, determine which, if any, of the following functions might be used as a model for the data. Quadratic: f(x) = ax2 + bx + c Polynomial, not quadratic Exponential, f(x) = aekx, k > 0 Exponential, f(x) = ae-kx, k > 0 Logarithmic, f(x) = a + b ln x Logistic, f(x) = 
Year
A. Exponential, f(x) = aekx, k > 0
B. Logistic, f(x) = 
C. Exponential, f(x) = ae-kx, k > 0
D. Logarithmic, f(x) = a + b ln x
Answer: D
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