Regressionsanalyse handler kort sagt om, you should make an analysis of, hvordan en udvikling bedst kan beskrives. The development can be described using. formal / equation / regulatory. This gives you an idea of, how development “average” develops.

Sometimes things develop in linear (growing at the same value all the time) and sometimes non-linear.

How to do:

In GeoGebra can choose to receive a regressionsannalyse.

1. View the spreadsheet under the 'Show’ og derefter Regnark (Keyboard shortcut CTRL + SHIFT + S).
2. Enter the values ​​in cells.
3. 
4. As you can see on the picture, so does the values ​​in the B column is not of the same value. It is therefore important to find an average increase
5. You must select all the numbers.
6. Then press the small Triangle by -button.
7. Now you can see the menu.
8. Så vælger du ‘Two-variable regression analysis’ .
9. Then comes “Data Source” forward.
   
10. Press Analyses.
11. Now you see the following window:
    
12. Vælg ‘lineær’ under regression model. (If you are thinking, that it is a linear development. Otherwise test polynomial.)
    
    
13. Now you can read the rule / formula / equation for development. In this case y = 2.2x 1.5
14. That means, the development evolves with 2.2.
15. You CAN choose to transfer the graph to the drawing pad. You can do this by right-clicking on the graph and select “Copy the characters block” (or any of the other menu items).