*To*: mathgroup@smc.vnet.net*Subject*: [mg10808] Calc formula from table*From*: Pieter van Wyk <modeltec@icon.co.za>*Date*: Thu, 5 Feb 1998 00:58:53 -0500*Organization*: Modeltec

Could anyone help me: I need to know how to calculate a third order parabolic formula from a table. I.o.w. I have a table of data and I need a manual way to calculate the formula for the curve of the data . 3rd order formula to be obtained: Y=AX**3 + BX**2 + CX + D example data: y = 338.7 263.5 198.6 150.5 114.7 80.3 55.5 41.9 30.2 19.3 16.5 12.4 10.1 x= 30 40 50 60 70 80 90 100 110 120 130 140 150 answer: Y=-0.0002X**3 + 0.0896X**2 -12.945X +651.3 I need a manual method to calculate this formula. Can it be done without using integration/differentiation. Maybe lin log exp? Answers will be appreciated. Regards, Pieter.

**Follow-Ups**:**Re: Calc formula from table***From:*Daniel Lichtblau <danl@wolfram.com>