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2 marksDirect and Inverse Variation

CSEC Mathematics · May/June 2013 · Paper 2 · Question 5(a)(ii)

The incomplete table below shows one pair of values for A and R where A is directly proportional to the square of R. The table has values: A=36 when R=3, and A=196 when R=5.

Calculate the value of the constant k.

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Other parts of this question

  1. 5(a)(i)Express A in terms of R and a constant k.[1 mark]
  2. 5(a)(iii)Copy and complete the table.[2 marks]
  3. 5(b)(i)Determine the value of fg(2).[3 marks]
  4. 5(b)(ii)Determine the value of f⁻¹(3).[3 marks]

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