1. Section 2

1.13. Lesson 2

Mathematics 20-3 Module 3

Section 2: Slope—Rate of Change

 

Lesson 2: Rate Problems—Combining Strategies

 

Focus

 

This is a photo of a person skateboarding.

Hemera/Thinkstock

Rob Thomson skateboarded 12 159 km around the world in 850 days. This adds up to almost 2.5 years! The trip cost him a total of $16 000, or approximately $18.82 per day.

 

The skateboarding experience involved visiting many places, experiencing interesting things, and meeting unique characters. Using the strategy of unit analysis or proportional reasoning, you can calculate that Rob travelled 14.30 km per day. The assumption is that Rob skateboarded every day. Do you think he did?

 

In this lesson you will learn how strategies of unit analysis and proportional reasoning can help you solve problems.

 

Lesson Question

 

In this lesson you will investigate the following question:

  • How are proportional reasoning and unit analysis used to solve rate of change problems?
Assessment

 

Your assessment for this lesson may include a combination of the following:

  • course folder submissions from the Try This and Share sections of the lesson
  • your contribution to the Math 20-3: Glossary Terms and the Formula Sheet
  • Lesson 2 Assignment (Save a copy of your lesson assignment document to your course folder now.)
  • the Project Connection 
Materials and Equipment
  •  calculator