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

• Speed is a quantification of motion.
• An object’s speed is NOT an addition of “instantaneous speeds” at different moments divided by how many speeds you have.
• The average speed of an object in motion is always with reference to some interval of time.
• Average rate of change is a way of characterizing the variation of input and output quantities of a non-linear function. It is a tool for describing the relationship between covarying quantities.
• The average rate of change of a function $f$ from $x = x_1$ to $x = x_2$ is the constant rate of change of a linear function $g$ that has the same change in output values as the function $f$ over the interval $[x_1, x_2]$.