Node ↔ each data point on Graph
aka Nodes
References
Undirected Edge↔ Edge flow both ways between NodesDirected Edge↔ Edge flow in one direction between NodesWeighted Edge↔ Edge with extra (numeric) data about Node connectionCyclial Edge↔ Edge point back to same NodeAdjacency Matrix↔ 2D Binary Matrix (as Array) to rep of Graph as # Nodes===# row/col & fill 1 for each Edge