### Home > CALC > Chapter 6 > Lesson 6.3.1 > Problem 6-86

6-86.

Use point-slope form.

Refer to hint in part (a).

Sketch the tangent lines. Are they parallel? Are they perpendicular? Neither?

Look at their equations... describe a pattern you see in their slopes.

Recall that the concavity of the graph determines whether tangent lines lie above or below the curve.