During the first session you learned how to make a model in the DVD Recorder activity. You'll find the most important information from that activity here
Adding Variables and Relationships
Add variables and relationships with the left buttons.
The meaning of these variables and relationships are explained in the Types of variables and Relationships. helpfile.
You define the name and beginning value of a variable or constant in the "Specify variable" window. Double click on a variable or constant to open this window.
In the "Specify variable" window you fill two things in (see example below)
You can find more information about defining a auxiliary in the helpfile Specifying a Model.
In this assignment you work with qualitative relationships. You define these relationships in the "Specify variable" window. This works as follows:
Now the window changes (see picture below). You make a qualitative relationship by choosing one from the drop down list.
Change the run time of the model
Open the "Properties" window to fill in the "Stop time" of the model.