Go to https://www.jensenmath.ca/12afl3ins... for a copy of the lesson and worksheet.
In this lesson you will learn different ways to estimate the slope of a tangent line:
1) Secant slope over a surrounding interval
2) Average of secants slopes from a preceding and following interval
3) Draw the tangent line and estimate the slope
4) Find the LIMIT of secant slopes as the change in x approaches zero

Enjoy!