We Are Interested in Determining What Type of Model Best $\alpha$

Essay

We are interested in determining what type of model best describes the relationship between two variables x and y.
a.For a given data set,an estimated regression equation relating x and y of the formwas developed,using Excel.The results are shown below.Comment on the adequacy of this equation for predicting y.Let $\alpha$ = .05.

b.An estimated regression equation for the same data set (as in part a)of the formwas developed.The Excel output is shown below.Comment on the adequacy of this equation for predicting y.Let $\alpha$ = .05.
c.Use the results of Part b and predict y when x = 4.