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Year 7 - Maths

Plotting a relationship

Plotting coordinates

Unit Summary

In this unit pupils revisit and further develop their understanding of the coordinate plane, and learn how to plot non-integer coordinates. Pupils then plot from an equation both by hand and by using technology.

Lesson Summary

You will learn to use a graphical representation to show all of the points (within a range) that satisfy a relationship.

Key Notes

  • A line can be drawn using coordinates found following a rule.
  • You can check any point on the line and it will satisfy the rule.
  • Points that are not on the line do not satisfy the rule.
  • Points can be tested to see if they are on the line or not.

Vocabulary To Learn

  • Substitution: Substitute means to put in place of another. In Algebra, substitution can be used to replace variables with values.
  • Integer: An integer is any positive or negative whole number or zero.

Common Mistakes To Avoid

  • Pupils may join up their coordinates but not extend their line.

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

A line can be drawn using coordinates found following a rule. You can check any point on the line and it will satisfy the rule.

2. Use this key word in a maths sentence and explain it clearly. 'Substitution'

Substitute means to put in place of another. In Algebra, substitution can be used to replace variables with values. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Pupils may join up their coordinates but not extend their line. Correction: Lines are used to represent all coordinates that follow a rule. Unless given restrictions, lines should be infinitely long.

More Lessons In This Unit

Browse all guides in the Year 7 Maths guide library.