Intro to graphs

In this section, you will learn what graphs are and see examples of things which can be represented by graphs. You'll also learn how to identify the vertices and edges of a graph, and that some graphs can be drawn in multiple ways. Further, you'll learn how to identify simple graphs, the null graph, the empty graph, and the trivial graph. In addition to all this, you'll learn how each graph can be represented by its vertex and edge sets.