This is a re-do of 6.1 and it is shorter and more to the point. I just got a new mic, so there are some puffs- sorry!
This is the first video I did. The only difference is that it has a heavy diff eq at the end of this. For you math heads/engineering types, you may want to look at the last problem.
Section 6.1 will introduce you to slope fields and verifying differential equations.