Question 193194
Here's some terminology:


Vertex: A point representing a location (city, town, etc...). In general, what the vertex represents isn't important.


Edge: A line connecting two vertices (plural for vertex)


Odd Vertex: A vertex with an odd number of edges connecting to it


Even Vertex: A vertex with an even number of edges connecting to it







So here's one way to draw the graph:


<img src="http://i150.photobucket.com/albums/s91/jim_thompson5910/Algebra%20dot%20com/graph22.png">



Take note that...


Vertex A: even vertex with 2 edges connecting to it


Vertex B: odd vertex with 3 edges connecting to it


Vertex C: even vertex with 2 edges connecting to it


Vertex D: odd vertex with 3 edges connecting to it