**Introduction to average rate of change (video) | Khan Academy**
https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:functions/x2f8bb11595b61c86:average-rate-of-change/v/introduction-to-average-rate-of-change

May 23, 2018 · This is because velocity is the rate of change of position, or change in position over time. Here, the average velocity is given as the total change in position over the time taken (in a given interval). Using your idea of an average, to find the average velocity we'd want to measure the velocity at a …

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