4024/11 Oct/Nov 2020, Question 21: Perpendicular Lines
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
Find the equation of line L, which is perpendicular to y = −(1/2)x + 3 and passes through (8, 9).
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Solution · 3 marks
- 1Gradient of given line = −1/2, so gradient of L = 2
- 2y = 2x + c through (8, 9): 9 = 16 + c, c = −7
- 3y = 2x − 7
Answery = 2x − 7
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Also searched as: 4024/11/O/N/20 · 4024_w20_qp_11 · 4024 w20 11 · question 21.
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