
Concept explainers
In each of the next two problems, two linear models are given for the data. For each model,
(a) Find the residuals and their sum;
(b) Find the sum of the squares of the residuals;
(c) Decide which model is the better fit. (See Example 2.)
International Trade The following table shows the South Koreas’s petrochemical exports to China (in billions of dollars) for several years.
Year | 2010 | 2011 | 2012 | 2013 | 2014 |
Petrochemical | 16 | 21 | 21 | 23 | 21.4 |
Let x=10 correspond to the year 2010. Two equations that model these data are

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Chapter 2 Solutions
Finite Mathematics with Applications In the Management, Natural, and Social Sciences (12th Edition)
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