ECZ 2021 · O-Level Paper 1 — Variation
It is given that y varies directly as 2x and inversely as z2, and y = 4 when x = 8 and z = 2. Find the value of k, the constant of variation.
- A. 2
- B. 4
- C. 12
- D. 1
Verified working — step 1
Translate the words exactly: "directly as 2x" puts 2x on top - not just x - and "inversely as z2" 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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