Ummm...sorry, but I'm at a loss as to what you are suggesting...

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Tushar Mehta
www.tushar-mehta.com
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In article ,
says...
why not just have a list of diffrent temps and another with the
co-responding S.G value, and then the formula, (then plot a graph) -
it's this what is commanly done?

a b c
Temp Sp. Garv. forumal
1 .002 = a*b+2
2 .003
3 .004
4 .003
4 .033

and so on?

Good Luck
Ross