Instantly find the rate of change at a point. The video presents an example illustrating how to find the rate of change at a point on a function. Using graphs, the presenter illustrates the method of approximating the slope of the tangent line by using the slope of a secant line. The illustration develops the definition of the derivative in the first video in a series of 31.

Concepts

derivatives, tangent lines, secant, rate of change, slope

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Additional Tags

math

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Instructional Ideas

• Stop the video and have learners calculate the derivative of the example before it gives the steps and answer

Classroom Considerations

• The class should know how to calculate limits

• This video is hosted on YouTube

Pros

• Contains bookmarks within the video, allowing class members to review specific sections 
• Uses colors to distinguish lines in the illustration

Cons

• None