Ch.+3,+Lessons+1-6

**Chapter 3: Functions and their Graphs

Here are the blog entries for each lesson in this chapter. **
 * 1) [|The Idea of a Function]
 * 2) [|Descartes and the Coordinate Graph]
 * 3) [|Graphing Linear Functions]
 * 4) Functions with Parabolic Graphs
 * 5) More Functions with Curved Graphs
 * 6) [|Interpolation and Extrapolation: Guessing Between and Beyond]

[|All blog entries] for Chapter 3 in reverse order from Lesson 6 to Lesson 1.

Ihor Charischak led the discussion about Chapter 3.