Question 78076: I am unable to answer this can someone help.
1. a) Historical data for Smith Cellular is charted below. Develop a linear model and use it to predict the amount of sales in the future years.
35
30 30____
25 26___
21.5___
15 14.2___
11.3__
10
8___
5
0
2001 2002 2003 2004 2005 2006
b) Explain your rational for the linear model that you develped. (Why did you choose the data points that you did to determine the model?)
c) Use your model to predict the sales in year 2010.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1. a) Historical data for Smith Cellular is charted below. Develop a linear model and use it to predict the amount of sales in the future years.
35
30 30____
25 26___
21.5___
15 14.2___
11.3__
10
8___
5
0
2001 2002 2003 2004 2005 2006
b) Explain your rational for the linear model that you develped. (Why did you choose the data points that you did to determine the model?)
-------
You have a set of 6 points: (1,30),(2,8) etc
Put them in your calculator and run a Linear Regression program against
the data.
You get a least-squares regression line: sales=-1.69038(year)+24.69807...
c) Use your model to predict the sales in year 2010.
Letting the year=10 you get sales = 7.7942
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Cheers,
Stan H.
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