Consider the following values for the dependent and independent variables:

x y 6 5 9 20 14 28 18 30 22 33 27 35

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 a = 0.05 level.

c. Develop a regression equation of the form yn = b0 + b1 ln1x2. Does this equation provide a better fit to the data than the equation in part b?