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sweet [91]
3 years ago
7

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

Business
1 answer:
Tamiku [17]3 years ago
7 0

Answer:

y = 7.678X + 357.614 ;

518.852 ; 526.53 ;

Week 78;

Explanation:

Given the data :

Week Number Week Number Week Number

1 370 7 415 13 450

2 380 8 425 14 455

3 390 9 435 15 475

4 380 10 425 16 485

5 390 11 435 17 495

6 395 12 445 18 505

The linear trend line for expected freight car loading obtained using a linear model calculator is :

y = 7.678X + 357.614

y = expected freight car loading

X = week

m = slope = 7.678 ;

c = intercept = 357.614

B.)

predicted loading for week 21:

X = 21

y = 7.678(21) + 357.614 = 518.852

Predicted loading for week 22:

y = 7.678(22) + 357.614 = 526.53

C.)

Week loading volume should exceed 950:

y = 950

950 = 7.678X + 357.614

950 - 357.614 = 7.678X

592.386 = 7.678X

X = 592.386 / 7.678

X = 77.153685

X = 78 (should exceed 950)

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Explanation:

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earnstyle [38]

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Explanation:

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Answer:

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