ECZ 2017 · O-Level Paper 1 — Coordinate Geometry
The gradient of the line joining the points (−2, k) and (k, −14) is 2. Calculate the value of k.
- A. 6
- B. −10
- C. −2
- D. −6
Verified working — step 1
Gradient = y₂ − y₁x₂ − x₁= −14 − kk + 2= 2. So −14 − k = 2k + 4, giving −18 = 3k and k = …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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