Intro of Corellation "r" to measure linear strength

I introduce correlation and how it measures the strength and direction of a linear relationship. I also discuss the many properties of correlation you must be familiar with. Coefficient of Determination is also defined. In the last example about MPG, r = -.8 and not positive .8 as written. 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