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# Graph

- Nodes -->
**vertices**- Objects

- Lines -->
**edges**- Connect the nodes
- Describe relationships among vertices
- Sometimes called arcs

**Undirected**- Edges are two-way
- No direction

**Directed**- Edges go one way
- Direction of edge is important

**Weighted**- Values are attached to the edges

**Adjacent vertices**- Two vertices connected by an edge