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For six local offices of a large tax preparation firm, the following data describe x 5 service revenues and y 5 expenses for supplies, freight, and postage during the previous tax preparation season:
x 5ppm,
y 5 ppm,
x 5 ppm,
x 5 Service Revenues
y 5 Supplies, Freight, Postage
Plain Text
Graphics
(Thousands)
30.0
20.0
26.0
17.0
$351.4
$18.4
33.0
31.0
7.5
4.5
291.3
15.8
28.0
23.0
27.0
19.0
325.0
19.3
32.0
24.0
34.0
422.7
22.5
8.4
5.6
238.1
16.0
514.5
24.6
a. Draw a scatter diagram representing these data.
b. Using the "eyeball" method, fit a straight line to the data.
c. Does there appear to be any relationship between the variables? If so, is the relationship direct or inverse?
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