City government has collected the following data on annual sales tax collections and new car registrations:
Y: Annual Sales Tax Collections ($ millions) X: New Car Registrations(thousands)
1.0 10
1.4 12
1.9 15
2.0 16
2.1 17
2.3 20
a) Determine the least squares regression equation.
b) Using the results of part (a), find the estimated sales tax collections if new car registrations total 22.