Use the table "Food and Beverage Sales for Luigi's Italian Restaurant" to answer the questions below.
Food and Beverage Sales for Luigi's Italian Restaurant
($000s)
Month First Year Second Year
January 218 237
February 212 215
March 209 223
April 251 174
May 256 174
June 216 135
July 131 142
August 137 145
September 99 110
October 117 117
November 137 151
December 213 208
Part (a) Calculate the regression line and forecast sales for February of Year 3.
Part (b) Calculate the seasonal forecast of sales for February of Year 3.
Part (c) Which forecast do you think is most accurate and why?