Mathematical calculation

[j235]

I have a math problem and I want to ask me pomognete.I working on complex desktop database.My main point is making the application for the simulation of tax revenue in Access 2013.

Currently I have a mathematical formula written in Access for linear regression coefficent (X and Y) RegressCoeff: (Avg (X * Y) -Avg (X) * Avg (Y)) / VarP (X), but I need a formula to work with three unknowns X, Y and Z.
Please help me glad to expand the formula to work with three X, Y and Z .

 

[BlueIshDan]

http://www.real-statistics.com/multiple-regression/multiple-regression-analysis/

 

[BlueIshDan]

hope that helps you

 

[j235]

I will try. Thank you !