Function vs Relation

I introduce the concepts of Function and Domain. I compare and contrast them with coordinates, graphs, and equations through many examples. EXAMPLES at 5:14 11:02 16:05 18:12 21:33 23:05 Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob