To estimate market potential for the garden tractor division of the M–F Implement Co., Mark Haynes, the statistician, estimated the following relationship using multiple regression analyses:

Using data for 2010–2016, R² = 65.0 was obtained. Should this method be used to predict market potential?

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Y = a + b₁X₁ + b₂X₂ + b₂X₂ + b₂x₁ where Y = unit sales of U.S. garden tractors X, = number of single-family homes X₂ = disposable personal income X, index of food prices X = family size =