ECZ 2016 · O-Level Paper 1 — Variation
It is given that w = kx²⁄y. If x = −6, y = 12 and w = 15, find k.
- A. 3
- B. 5
- C. 45
- D. 1⁄5
Verified working — step 1
Substitute the known triple - squaring x FIRST, which also removes its minus sign.The full step-by-step working and final answer, plus the video lesson for this topic, 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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