Use the following graph for Exercises 18 and 19 Describe the
     Use the following graph for Exercises 18 and 19:  Describe the graph pictured above, using the formal graph notation.  M(StateGraph) =  E(StateGraph)=   
  
  Solution
By defintion a graph(V,E) is defined by set of vertices V and edges E.
Here we will have two set one is set of Vertices and another is set of edges which is (vi, vj where vi and vj belongs to V).
a) V(StateGraph) = {Oregon,Alaska,Texas,Hawaii,NewYork,Vermont,California}
b) Edge(StateGraph) = Here we weill see the graph and mention the edges which will connect two vertices
{Alaska - Oregon,
 Hawaii - Alaska,
 Hawaii- California
 Hawaii-NewYork
 Hawaii- Texas
 Texas-Vermont
 Vermont-California
 Vermont-Alaska
 Vermont-NewYork
 Texas-Hawaii}
There are 10 egdes in this graph

