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2 marksEvaluating Functions at Given Values

CSEC Mathematics · January 2011 · Paper 2 · Question 5(b)(i)

The arrow diagram represents the relation f: x → x² - k, where x ∈ {3, 4, 5, 6, 7, 8, 9, 10}. The diagram shows mappings: 4 → 11, 5 → 20, 6 → 31.

Calculate the value of k.

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Other parts of this question

  1. 5(a)(i)Determine the gradient of the line.[2 marks]
  2. 5(a)(ii)Determine the equation of the line which is perpendicular to 3y = 2x - 6, and passes through the point (4,7).[3 marks]
  3. 5(b)(ii)Calculate the value of f(3).[2 marks]
  4. 5(b)(iii)Calculate the value of x when f(x) = 95.[2 marks]

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