Session 4, Part C:

 In This Part: Playing with Quadperson  | Graphs of Proportional Relationships

 Problem C2 Compare the "before" and "after" quadperson when you subtracted half an inch from each length.

 Problem C3 Of Problems C1 and C2, which is a relative comparison? Which is an absolute comparison? Explain how you know.

 Problem C4 Did the Quadperson look the same after a change made by an absolute comparison? Did the Quadperson look the same after a change made by a relative comparison? Why?

 Video Segment In this video segment, Andrea and Deanna compare the two versions of Quadperson and discuss why one Quadperson is more in proportion with the original than the other. Watch this segment after you've completed Problems C1-C4, and reflect on the onscreen participants' reasoning about the results of their drawings. Would every absolute comparison change the shape of Quadperson? Would every relative comparison maintain the shape of Quadperson? You can find this segment on the session video, approximately 5 minutes and 58 seconds after the Annenberg Media logo.

 Video Segment In this video segment, the onscreen participants discover the proportional change in area determined by the relative change in Quadperson. Can you explain why the two-dimensional area would change in the manner described in this segment? This topic will be further explored in the "Measurement" course. You can find this segment on the session video, approximately 8 minutes and 41 seconds after the Annenberg Media logo.

 Session 4: Index | Notes | Solutions | Video