Lesson objective: Solve problems involving scaled graphs.

This lesson helps to build procedural skill with interpreting data on scaled graphs. Bar graphs are used here because they offer authentic opportunities to apply skills and provide visual representations of relationships between pieces of data. This work develops students' understanding that picture graphs and bar graphs can have scales other than one.

Students engage in Mathematical Practice 3 (Construct viable arguments and critique the reasoning of others) as they explore different ways to approach and solve the problems.

**Key vocabulary:**

- bar graph
- data
- interpret
- scale