ECZ 2020 · GCE Paper 1 — Variation
It is given that y varies inversely as the square of x. The table below shows some values of x and corresponding values of y. x2b6y94a Find the value of k, the constant of variation.
- A. 4.5
- B. 72
- C. 36
- D. 18
Verified working — step 1
"Inversely as the square of x" means y = kx2. Read the one COMPLETE column of the table and substitute it.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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