Defining the fox population as a function of time

• Double click ‘Foxes at start’ node.

Expected: Object window should appear.

• In the Description field type ‘The fox population at the start of each time period’.

• Press tab. At the Definition field, ‘Dynamic(5,Foxes_at_end[Time-1]*(1+Fox_birth_rate). Click check to accept the definition.

• Double click ‘Foxes at end’.

Expected: Object window should appear.

• . Type ‘The fox population at the end of each time period’ in the Description field.

• Press tab to Definition field. Click ‘Inputs’ popup menu button, select ‘Foxes_at_start’.

• ‘Foxes_at_start’ should appear on the Definition field. Click on the check button to accept your entry. Click on the diagram button.

8. With the Foxes at end node selected, click on the result button. Result window should appear.