ECZ 2023 · GCE Paper 1 — Variation
Z varies inversely as the square of x and directly as y, and z = 6 when x = -3 and y = 27. Find the value of k, the constant of variation.
- A. 12
- B. 54
- C. 18
- D. 2
Verified working — step 1
Translate the words first: "inversely as the square of x" puts x2 underneath; "directly as y" puts y on top.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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