Question: Given an independent variable x and a dependent variable y , a quadratic regression model of the form y = 0 + 1 x +

Given an independent variable x and a dependent variable y, a quadratic regression model of the form y = 0 + 1x + 2x2 + is constructed.Then:

a)Nonsense:such a model can never be validly constructed.

b)The model can be constructed and may predict that the maximum y occurs at the minimum x-value.

c)The model can be constructed and may predict that the maximum y occurs at the maximum x-value.

d)The model can be constructed and may predict that the minimum y occurs at the minimum x-value.

e)The model can be constructed and may predict that the minimum y occurs at the maximum x-value.

f)The model can be constructed and may predict that the maximum y occurs near the middle of the x-values.

g)The model can be constructed and may predict that the minimum y occurs near the middle of the x-values.

h)Any of b through g may occur.

The best choice is ________________.

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