0580/33 Oct/Nov 2025, Question 26: The Equation y = mx + c
Cambridge IGCSE Mathematics 0580 · Paper 33 (Core) · Calculator · 3 marks
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The question, in short
A straight line L is shown on a grid passing through (−5, −6) and (4, 21). Find its equation in the form y = mx + c.
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Solution · 3 marks
- 1From (−5, −6) to (4, 21): rise = 27, run = 9
- 2Gradient m = 27 ÷ 9 = 3
- 3L crosses the y-axis at (0, 9), so c = 9
- 4y = 3x + 9
Answer3x + 9
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Also searched as: 0580/33/O/N/25 · 0580_w25_qp_33 · 0580 w25 33 · question 26.
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