# Graphs

## Keywords Associated with Graph Problems
* vertices
* nodes
* edges
* connections
* connectivity
* paths
* cycles
* direction

## Key Terms
* **node (vertex)** - a discreet position on the graph
* **edge (connection)** - a link between two nodes. It can be directed (one way) or undirected.
* **graph** - a set of vertices and a collection of edges
* **order** - the number of vertices in a graph
* **size** - the number of edges in a graph

A singly linked list is an example of the simplest types of graphs.

## Cost Function

Create and add graph notes
Create and add graph notes
