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Order# BB38108.docx - (LR-1 Purpose To analyze the national...

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(LR-1) Purpose : To analyze the national debt of the United States of America using a linear model Data : The National Debt data were retrieved from http://useconomy.about.com/od/usdebtanddeficit/a/National-Debt-by-Year.htm The national debt data were gathered from 2000 to 2015, though more data was available going back to 1929. DATA: United States of America National Debt Year Debt (9/30, in billions) 2000 $5, 629 2001 $5, 770 2002 $6, 198 2003 $6, 760 2004 $7, 355 2005 $7, 905 2006 $8, 451 2007 $8, 951 2008 $9, 986 2009 $11, 876 2010 $13, 529 2011 $14, 764 2012 $16, 050 2013 $16, 719 2014 $17, 794 2015 $18, 151
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(LR-2) SCATTERPLOT : Just as someone would expect, the national debt generally show an upward trend, this is mainly contributed by increase in inflation rate as well as the population rate. The trend is somehow linear.
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(LR-3) Line of Best Fit (Regression Line) y = 933.49 x – 1863000 where x = Year and y = National debt (in billions). (LR-4) The slope is 933.49; it is positive mainly because the national debt is generally increasing. Hence, this shows that the national debt keeps on increasing by 933.49 billion every year.
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