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Consider the following table of the number of Americans
that are over 100 in
various years.
Year  Number (in 1000’s) 
1994 1996 1998 2000 2002 2004 
50 56 65 75 94 110 
How many would you predict would be over 100 in 208?
Let’s plot the data in our calculator, using L_{1} for Year and L_{2} for Number.
Set a WINDOW of [1992, 2008] × [0, 180].
The data is more curved than linear , but not so much that
linear regression is
not an option. The line of best fit for linear regression is
y = 6.057x − 12.033.229
or
f(x) = 6.057x − 12.033.229.
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