(Answered) : Freight car loadings over an 18-week period at a busy port are as follows: Week Number Week Number Week Number 1 260 7 325 13

Freight car loadings over an 18-week period at a busy port are as follows:

Week Number Week Number Week Number
1 260 7 325 13 405
2 265 8 345 14 410
3 270 9 365 15 460
4 265 10 360 16 465
5 270 11 380 17 470
6 275 12 400 18 475

a. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal places.)

Y ˆ Y^ = + t

b. Use the above trend equation to predict expected loadings for Weeks 20 & 21. (Round your final answers to 2 decimal places.)

The forecasted demand for Week 20 is and for Week 21 is .

c. The manager intends to install