Lesson 2.7: Display Proportions
Lesson
![]1000 *What elements make up the human body? What sources of energy generate electricity production in the US?* Students could answer these questions with a list such as “Hydrogen, Oxygen, Carbon, Nitrogen…” or “Oil, gas, hydro, nuclear, solar, wind…”. But a much more informative answer would include the proportional contribution of each source. That’s where pie charts and stacked bar charts are useful. This lesson reviews how to graph proportional information in Tuva, and a few strategies for using data and graphs to support students’ understanding of proportion, percent, and ratio. Key concepts for students: Choose pie charts or stacked or stretched bar charts to show components of a group in proportion Understand that percentages making up a whole must add up to 100% Key Words:
Topics and standards: Proportion