ECZ 2020 · O-Level Paper 1 — Coordinate Geometry
P is the point (3, 1) and Q is another point such that the gradient of the line PQ is -12. Write down the equation of PQ.
- A. 2y = x + 5
- B. y = -2x + 5
- C. 2y = -x + 5
- D. 2y = -x - 5
Verified working — step 1
Using y - y₁ = m(x - x₁): y - 1 = -12(x - 3). Multiply by 2: 2y - 2 = -x + 3, so 2y = …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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