SOLUTION: The following data lists the total number of Papa John’s Pizza restaurants in the world at the end of the given year. This information was obtained from the company web site at ww

Algebra ->  Linear-equations -> SOLUTION: The following data lists the total number of Papa John’s Pizza restaurants in the world at the end of the given year. This information was obtained from the company web site at ww      Log On


   

Question 349257: The following data lists the total number of Papa John’s Pizza restaurants in the world at the end of the given year. This information was obtained from the company web site at www.papajohns.com.

YEAR NUMBER OF RESTAURANTS
2003 2,790
2004 2,829
2005 2,926
2006 3,015
2007 3,208
2008 3,380

a. Find the equation of the regression line for this data. Round values to three decimal places.


b. Find the best predicted number of Papa John’s restaurants at the end of 2009 and 2010.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a)
xave=2005.5
yave=3024.67
SSXX=17.5
SSYY=263055.33
SSXY=2088
b=SSXY%2FSSXX=119.314
a=yave-b%2Axave=-236260.133
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highlight%28y=119.314x-236260.133%29
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I re-ordered the data so that 0=2003 for plotting purposes.

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b)
For x=2009, y=3441.693
For x=2010, y=3561.007