Here are the main points that will be addressed in the videos. Please read these and think about them as you watch.

- These videos focus on the concept of graphing constant rate of change between two variables.
- When two quantities vary at a constant rate with respect to each other, the graph of their relationship forms a straight line.
- When two quantities, and , vary at a constant rate with respect to one
another, the
*change in*y is always a constant multiple of the*change in*x.