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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 L1 for Year and L2 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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