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Cambridge IGCSE Mathematics

3.5Equations of linear graphs

Equations of linear graphs in Cambridge IGCSE Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
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Learning objectives

What the syllabus expects you to be able to do.

  1. 3.5.1Find and interpret the gradient and y-intercept of a straight line from its equation (Core: y = mx + c; Extended: also forms such as ax + by = c).
  2. 3.5.2Find the equation of a straight line from its graph or from given information, in a fully simplified form.

Lessons

  • The equation of a straight line

    30 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Equations of linear graphs: sample question

1 mark

Which line has gradient −12-\frac{1}{2} and crosses the yy-axis at (0,3)(0, 3)?

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