c. The managers intends to install new equipment when the volume exceeds 960 loadings per week. Assuming the current trend continues, in which week (at the earliest) should the loading volume reach that level? (Use the rounded answers, as required, from any previous part of this problem. Do not round any other intermediate calculations. Round your final answer to 2 decimal places.)

Freight car loadings over an 18-week period at a busy port are as follows: Week 1 2 3 Number 380 385 390 Week 7 8 9 10 Number 450 500 550 545 Week 13 14 15 Number 655 665 715 720 4 385 16 5 11 595 17 725 390 400 6 12 645 18 730 Click here for the Excel Data File a. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal places.) = + b. Use the above trend equation to predict expected loadings for Weeks 20 & 21. (Round your final answers to 2 decimal places.)