0580/11 Oct/Nov 2021, Question 19: The Equation y = mx + c
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks
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The question, in short
A straight line L is shown on a graph passing through (−2, −4) and (2, 8). Find the equation of L in the form y = mx + c.
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Solution · 3 marks
- 1Line passes through (−2, −4) and (2, 8)
- 2Gradient = (8 − (−4)) ÷ (2 − (−2)) = 12 ÷ 4 = 3
- 3Crosses the y-axis at (0, 2), so c = 2
- 4y = 3x + 2
Answer3x + 2
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Also searched as: 0580/11/O/N/21 · 0580_w21_qp_11 · 0580 w21 11 · question 19.
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