[alogo] System of active axes

Axes
1) Select the point-tool (CTRL+E)
2) Click pressing simultaneously ΗΟΜΕ (defines the axes-origin) (A)
3) Click pressing simultaneously F2 (defines the x=1, y=0, point) (B)
4) Click pressing simultaneously END (defines the x=0, y=1, point) (C)
5) Select the line-tool (CTRL+L)
6) click next to (A) ... drag ...release mouse button next to (B): defines the x-axis (a)
7) click next to (A) ... drag ...release mouse button next to (C): defines the y-axis (b)
8) hide points A, B, C (right-click on them and select [hidden])
9) make scheme immovable: right-click on a , pressing simultaneously SHIFT
10) from the displayed scheme-graph-dialog, press the button on the upper-left: [make immovable]

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Active axes: meaning that one can define points on them (exactly) and compute the coordinates of any point, by projecting it to the axes and measuring the coordinates with the tool [Measures \ Length Gauge _ _ ]).

This document can be used as starting point (making a copy of it), for the study of functions. Instead of creating the axes-system from the beginning, make a copy of the present document and remove these text boxes, the arrows etc.
The simplest way to achieve that is
Ο απλούστερος τρόπος να γίνει αυτό είναι
1) Open this document
2) Save the document under a new name [File \ Save as ... ] (give the name you like).
3) Delete text boxes etc. you don't need
4) Do your constructions and save the document.
An example of such a work is the file: Graph_tangent.html .

Another example of active axes, describing explicitely their construction is given in the document: Point_On_Function_Graph.html .

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