[HP-12C] Angular coefficent from linear regression off by 1

[Csaba Tizedes]

(05-12-2016 06:32 PM)bshoring Wrote:  

(05-11-2016 05:58 AM)Dieter Wrote:  \(m = (\bar y-b)/\bar x\).

How would I do that in RPN ?

01: 0
02: g y,r
03: RCL 1
04: ×
05: CHS
06: RCL 4
07: +
08: RCL 2
09: ÷
10: R/S


The result is same: 11.09933164

The above equation for the fitted line means that the least squares method fits a line which is goes through the center of "gravity" of the data points. If you know that you'll never forget how simple to calculate slope of that line.

Csaba