Making a function from the output of the Fit function.

*To*: mathgroup at smc.vnet.net*Subject*: [mg121489] Making a function from the output of the Fit function.*From*: Just A Stranger <forpeopleidontknow at gmail.com>*Date*: Sat, 17 Sep 2011 06:25:53 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Hello, So I am trying to use the Fit ffunction to make another function. So I want to do something like this: f[x_] := Fit[ data, {1,x}, x] But I want f[x] to be the function for the line, a+bx. But as written above it does not have this result of course (I know it's because whatever gets passed is used as an argument for the fit function, so passing a number doesn't work, and passing a variable simply isn't what I want to do) So how can I use the fit function to get f[x_] := a+bx (where a and b are the appropriate constants. ) My jerry rigged solution is to just execute Fit[ data, {1,x}, x] then copy and past the output to define a function. But this tacky solution just won't do :) Thank you for your help mathgroup.

**Follow-Ups**:**Re: Making a function from the output of the Fit function.***From:*DrMajorBob <btreat1@austin.rr.com>