Using real life data students learn how to draw and interpret line graphs. As learning progresses students learn how to use line graphs to interpret trends over time and predict future values.

At the start of the lesson students work in pairs to discuss three common mistakes when drawing duel bar charts. The end of lesson challenges students to examine the population increase and identify values that go against the overall trend.

**Differentiated Learning Objectives**

- All students should be able to construct a line graph given scaled axes.
- Most students should be able to construct and interpret a line graph to identify trends over time.
- Some students should be able to use a line graph to compare two sets of data over time.