Question 68162
The table lists the average tution and fees at public colleges and universities for selected years. 
Year 1985 1990 1995 1999 2004
Tuition and
Fees ($s) 1242 1809 2860 3356 5132 
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If you have a TI calculator
Enter the years in list L1
Enter the averages in list L2
Run the LinReg(ax+b) function against L1, L2, Y1 to get the regression equation
into Y=.
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(a) Find the equation of the least-squares regression line that models the data.
The regression equation: Tuition&Fees = 198.49(year)-393,033.87
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(b) Graph the data and the regression line in the same viewing window.
Can't do that on this site.

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 (c) Estimate tuition and fees in 2006.
Tuition(2006)=198.49(2006)-393,033.87
Tuition(2006) = $5142.60
I got this using the TABLE function of the TI-83
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 (d) Use the model to predict tuition and fees in 2010.
Tuition(2010) is approx $5936.60 according to the TABLE.
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Cheers,
Stan H.