Obviously, the 窶徘roduction cost窶 and the 窶彜elling price窶 affects the 窶彝evenue窶. We will now establish this relationship by linking the nodes. Select the 窶弃roduction cost窶 node, and drag it onto the 窶彝evenue窶 node. Observe that the 窶彝evenue窶 node becomes hilited when the cursor is above it.
Release the mouse button while the cursor is above the 窶彝evenue窶 node. This creates an edge pointing from 窶弃roduction cost窶 towards 窶彝evenue窶.
