Can all the dominoes in a double six set be placed in a single line of tiles adhering to the placement rules previously described Can they all be placed so that the single line loops back to the first domino The remainder of this activity sheet will help you answer these questions 1 Decide how to use a graph to model the Domino Placement problem Carefully define what your vertices represent and how you know when two vertices are connected by a edge 2 Based on your model restate the Domino Placement problem 3 What type of previously solved problem in this unit is this problem related to