ECZ 2016 · O-Level Paper 1 — Coordinate Geometry
Find the equation of the straight line passing through (−4, 4) and is perpendicular to the straight line whose equation is y + x⁄7 = 1.
- A. y = −1⁄7 x + 32
- B. y = 7x − 24
- C. y = −7x + 32
- D. y = 7x + 32
Verified working — step 1
Perpendicular gradients multiply to -1: flip the fraction AND flip the sign, then use the given point.The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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