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Home > PC > Chapter 9 > Lesson 9.3.5 > Problem 9-156


Show that the equation of the tangent line to the curve at the point is .  

Use the point - slope form for a linear function.
You are given a point. So now you need the slope of the tangent line.

1. Find the slope function at .
2. Graph the slope function.
3. As , what does the slope approach?

Use the slider in the eTool below to see that the slope at is . Then find the equation of the tangent line with the given point and slope.
Click the link at right for the full version of the eTool: 9-156 HW eTool