Find a linear trend line for expected freight car loadings

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Reference no: EM131018373

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

Week

Number

Week

Number

Week

Number

1

250

7

295

13

410

2

260

8

325

14

415

3

270

9

355

15

435

4

260

10

345

16

445

5

270

11

375

17

455

6

275

12

405

18

465

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.)

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

c. The manager intends to install new equipment when the volume exceeds 830 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.)

Reference no: EM131018373

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