# A9a – Plotting straight line graphs

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# Part 1 – Vertical and horizontal lines

Teacher resources for Part 1
• Coordinate grids – one quadrant (0 to 10) – for Alpha Exercise:
• Coordinate grids – four quadrants (-10 to 10) – for Beta and Gamma Exercises:

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Links to past exam questions

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Interactive GeoGebra activity: Horizontal and vertical lines and coordinates

# Part 2 – Lines of the form y = mx + c

Teacher resources for Part 2
• Coordinate grids – one quadrant (0 to 10) – for Alpha Exercise:
• Coordinate grids – four quadrants (-10 to 10) – for Beta and Gamma Exercises:

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Links to past exam questions

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Interactive GeoGebra activity: Identifying equations of straight line graphs

What is the equation of the line shown?

Interactive GeoGebra activity: Straight line graphs and coordinates
Interactive GeoGebra activity: Draw the line - RECOMMENDED ACTIVITY!

Drag the blue points to match the equation given. The line will turn green if you get it correct! Click the “New line” button to have another go.

With thanks to Steve Phelps, whose Graph the Line worksheet is available here. Material modified and embedded here under the CC-BY-SA 3.0 license.

# Part 3 – Lines of the form ax + by = k

Teacher resources for Part 3
• Coordinate grids – one quadrant (0 to 10) – for Alpha Exercise:
• Coordinate grids – four quadrants (-10 to 10) – for Beta and Gamma Exercises:

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Links to past exam questions

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In the real world

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