ECZ 2023 · GCE Paper 1 — Variation

Z varies inversely as the square of x and directly as y and z = 6 when x = -3 and y = 27. Find the (b) value of z when y = -6 and x = -2.

  • A. 12
  • B. -12
  • C. 3
  • D. -3

Verified working — step 1

z = kyx2

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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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