bug in polynomial fit

mrahikka shared this problem 10 months ago
Not a Problem

When I make the 2nd degree polynomial fit with x-values about 2000 and y values about 130000 I get a bad fit. The same happens in GG5 and 6.

81e98dd478e44be47d83af951595b067

Changing the x values starting from 1 makes a better fit.

fc601a07ff065d71a1e771502f3de8e7

Comments (3)

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1

Yes, the numbers should be normalized in some way before being used for the calculation. See eg


https://wiki.geogebra.org/e...

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OK, thanks.

I'll inform the Finnish users. This was in the preliminary exam for Matriculation this year.

M

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Still in CAS it works OK.

:o]

M49d0bc5a77031ace6cef00955c21bba2

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