Main Ideas

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

These videos focus on the concept of constant rate of change between two variables.
A constant rate of change between $x$ and $y$ means that, for any fixed amount of change $\Delta x$ , the corresponding amounts of change $\Delta y$ are constant.
If $x$ and $y$ represent the measures of two quantities, and $y$ varies at a constant rate of $\dfrac {\Delta y}{\Delta x}$ with respect to x, then the change in y is always $\dfrac {\Delta y}{\Delta x}$ as much as the corresponding change in $x$ .