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 (c) values of x when y = 8 and z = 1.

  • A. x = 4 or x = -4
  • B. x = 8 or x = -8
  • C. x = 4
  • D. x = 16 or x = -16

Verified working — step 1

1 = 28x2

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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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