I introduce graphing Logarithms (which I know is mispelled!) and expain how they are an inverse of exponential functions. At 1:48 I misspoke and stated that all exponential growth functions pass through (1,0), but the point is actually (0,1)
Here are my other PreCalculus lessons involving Logarithms
http://www.profrobbob.com/pre-calculus/exponential-functions-and-logarithms
Graphing Logarithmic Functions without a Calculator 3 Examples
https://www.youtube.com/watch?v=Y-yonLqEdzU&index=46&list=PL4FB17E5C77DCCE69
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 www.YouTube.com/Profrobbob