Question

What is a 4th degree polynomial model calculator for this set of data:

1994 2814
1996 3603
1998 5429
2000 3962
2001 4117
2004 3840

Answer 1

http://www.xuru.org/rt/pr.asp

you need fifth degree
a x^5 + b x^4 etc to go through all the six points but can use fourth all right and get a least square fit.

Answer 2

by the way I would call 1994 x = 0
1996 x = 2, 1998 x = 4 , 2000 x = 6, 2001 x = 7, 2004 x = 10

then add 1994 to t at the end.