Develop an estimated linear regression equation for the

Question

Question: Consider the following values for the dependent and independent variables:

x               y

5              10

15             15

40             25

50             44

60             79

80            112

a. Develop a scatter plot of the data. Does the plot suggest a linear or nonlinear relationship between the dependent and independent variables?

b. Develop an estimated linear regression equation for the data. Is the relationship significant? Test at an α = 0.05 level.

c. Develop a regression equation of the form y^ = b₀ + b₁x + b₂x² Does this equation provide a better fit to the data than that found in part b?