# Question

The table for part a shows approximate distances between selected cities and the approximate cost of flights between those cities in November 2009.

a. Calculate the correlation of the numbers shown in the part a table by using a computer or statistical calculator.

Cost Miles

180 ....... 960

400 ....... 3100

270 ....... 2000

100 ....... 430

443 ....... 3000

b. The table for part b shows the same information, except that the distance was converted to kilometers by multiplying the number of miles by 1.609. What happens to the correlation when numbers are multiplied by a constant?

Cost Kilometers

180 ....... 1545

400 ....... 4988

270....... 3218

100....... 692

443....... 4827

c. Suppose the Federal Aviation Administration (FAA) adds a tax to each flight. Fifty dollars is added to every flight, no matter how long it is

The table for part c shows the new data. What happens to the correlation when a constant is added to each number?

Cost Miles

230 ....... 960

450 ....... 3100

320 ....... 2000

150 ....... 430

493 ....... 3000

a. Calculate the correlation of the numbers shown in the part a table by using a computer or statistical calculator.

Cost Miles

180 ....... 960

400 ....... 3100

270 ....... 2000

100 ....... 430

443 ....... 3000

b. The table for part b shows the same information, except that the distance was converted to kilometers by multiplying the number of miles by 1.609. What happens to the correlation when numbers are multiplied by a constant?

Cost Kilometers

180 ....... 1545

400 ....... 4988

270....... 3218

100....... 692

443....... 4827

c. Suppose the Federal Aviation Administration (FAA) adds a tax to each flight. Fifty dollars is added to every flight, no matter how long it is

The table for part c shows the new data. What happens to the correlation when a constant is added to each number?

Cost Miles

230 ....... 960

450 ....... 3100

320 ....... 2000

150 ....... 430

493 ....... 3000

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