ECZ 2019 · GCE Paper 1 — Variation
Given that y varies directly as x and inversely as the square of z, and that y = 10 when x = 32 and z = 4, find the value of k, the constant of variation.
- A. 5
- B. 10
- C. 2
- D. 8
Verified working — step 1
Translate the words first: "directly as x" puts x on top; "inversely as the square of z" puts z2 underneath.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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