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. Sales The table shows the sales (in billions of dollars) for Wal-Mart stores from 2006 through 2013. (Source: Wal-Mart Stores, Inc.) Year 2006 2007 2008 2009 Sales 348.7 378.8 405.6 408.2 Year 2010 2011 2012 2013 Sales 421.8 447.0 469.2 476.2

. Sales The table shows the sales (in billions of dollars) for Wal-Mart stores from 2006 through 2013. (Source: Wal-Mart Stores, Inc.) Year 2006 2007 2008 2009 Sales 348.7 378.8 405.6 408.2 Year 2010 2011 2012 2013 Sales 421.8 447.0 469.2 476.2

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Sales The table shows the sales (in billions of dollars) for Wal-Mart stores from 2006 through 2013. (Source: Wal-Mart Stores, Inc.) Year 2006 2007 2008 2009 Sales 348.7 378.8 405.6 408.2 Year 2010 2011 2012 2013 Sales 421.8 447.0 469.2 476.2 (a) Setup a system of equations representing the data for the years 2006 - 2010, setup a system of equations to fit the data based on a quartic (4th degree) model. What are the equations? (b) Solve the system using Mathematica. What are the coefficients aî, A1, A2, A3, A4 of the quartic equation? (c) Produce a scatter plot in Desmos, and graph the function in the same window. Provide the graph below. (d) Does the solution produce a reasonable model for predicting sales after 2010?
Transcribed Image Text:Sales The table shows the sales (in billions of dollars) for Wal-Mart stores from 2006 through 2013. (Source: Wal-Mart Stores, Inc.) Year 2006 2007 2008 2009 Sales 348.7 378.8 405.6 408.2 Year 2010 2011 2012 2013 Sales 421.8 447.0 469.2 476.2 (a) Setup a system of equations representing the data for the years 2006 - 2010, setup a system of equations to fit the data based on a quartic (4th degree) model. What are the equations? (b) Solve the system using Mathematica. What are the coefficients aî, A1, A2, A3, A4 of the quartic equation? (c) Produce a scatter plot in Desmos, and graph the function in the same window. Provide the graph below. (d) Does the solution produce a reasonable model for predicting sales after 2010?
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