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 (a) value of k, the constant of variation,

  • A. 2
  • B. 4
  • C. 12
  • D. 1

Verified working — step 1

y = k2xz2

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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