City government has collected the following data on annual sales tax collections and new car registrations: Annual Sales Tax Collections (in millions) New Car Registrations (in thousands) Determine the following: 1.0 1.4 1.9 2.0 1.8 2.1 2.3 10 12 12 15 16 14 17 20

a) The least-squares regression equation.

b) Using the results of part (a), find the estimated sales tax collec- tions if new car registrations total 22,000.

c) The coefficients of correlation and determination.