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Lesson 1: Reading Line Graphs

About 30 minutes — Activity-based lesson

What You Will Learn

This lesson covers:

Parts of a line graph: x-axis (time), y-axis (measurement), data points, connecting line

This section covers the key ideas about parts of a line graph: x-axis (time), y-axis (measurement), data points, connecting line. Discuss with your group or family and explore the concepts together.

Reading specific values at specific times

This section covers the key ideas about reading specific values at specific times. Discuss with your group or family and explore the concepts together.

What the slope of the line tells you

This section covers the key ideas about what the slope of the line tells you. Discuss with your group or family and explore the concepts together.

Practice: read 5 line graphs and answer questions

This section covers the key ideas about practice: read 5 line graphs and answer questions. Discuss with your group or family and explore the concepts together.

Check Your Understanding

1. What do the axes of a line graph typically show?

Answer: The x-axis usually shows time (days, months, years) and the y-axis shows the measurement (temperature, sales, population, etc.).

2. What does a steep line tell you?

Answer: That the value is changing quickly. A steep upward line means fast increase; a steep downward line means fast decrease.

3. What do the dots on a line graph represent?

Answer: Each dot is an actual data point — a specific measurement at a specific time. The line connecting them shows the overall trend.

4. Can a line graph show more than one thing?

Answer: Yes! Multiple lines on the same graph let you compare how different things change over the same time period.

Key Takeaways

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