Take control and construct some lines and segments with some points on them, like in the example shown in the activity. Notice how:[br]• Some points can be dragged [b]freely[/b], [br]• Some can only be dragged in certain ways (we say they are partially “[b]constrained[/b]”) and [br]• Others cannot be dragged directly at all (we say they are fully “[b]dependent[/b]”).