Linking nodes

Obviously, the “production cost” and the “Selling price” affects the “Revenue”. We will now establish this relationship by linking the nodes. Select the “Production cost” node, and drag it onto the “Revenue” node. Observe that the “Revenue” node becomes hilited when the cursor is above it. 

Release the mouse button while the cursor is above the “Revenue” node. This creates an edge pointing from “Production cost” towards “Revenue”.