ECZ 2022 · O-Level Paper 1 — Variation

y varies directly as the square of x and inversely as z and y = 2 when x = 4 and z = 24. Find the (b) value of y when x = 9 and z = 27,

  • A. 27
  • B. 9
  • C. 3
  • D. 1

Verified working — step 1

y = 3x2/z

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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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