Question: (c) The data are clearly not linear. Two possible nonlinear models for the data are given below exponential model piecewise linear model Yi = exp(a

(c) The data are clearly not linear. Two possible nonlinear models for the data are given below exponential model piecewise linear model Yi = exp(a + bXi + ei)

Yi =

(

a1 + b1Xi + ei when Xi · 60 a2 + b2Xi + ei when Xi > 60.

The second model divides the data into two sections, depending on whether the price is above or below 60

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