This question was created from EIS 3332 Chp 3 HW Notes https://www.coursehero.com/file/12812917/EIS-3332-Chp-3-HW-Notes/

Problem 3-7 Freight car loadings over an 18-week period at a busy port are as follows: Week Number Week Number Week Number 1 290 7 335 13 490 2 300 8 375 14 495 3 310 9 415 15 515 4 300 10 405 16 525 5 310 11 445 17 535 6 315 12 485 18 545 a. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal places.) 1formula110.mml = + 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 new equipment when the volume exceeds 870 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.) It should reach 870 loadings in Week .

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(a) y = 279.80 +... View the full answer