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2 marksSubstitution in Algebraic Expressions

CSEC Mathematics · January 2012 · Paper 2 · Question 6(a)

The table below shows corresponding values of x and y for the function y = x² – 2x – 3, for integer values of x from -2 to 4.

Copy and complete the table.

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Other parts of this question

  1. 6(b)Using a scale of 2 cm to represent 1 unit on the x-axis, and 1 cm to represent 1 unit on the y-axis, plot the points whose x and y values are recorded in your…[4 marks]
  2. 6(c)Using your graph, estimate the value of y when x = 3.5. Show on your graph how the value was obtained.[2 marks]
  3. 6(d)(i)Write the equation of the axis of symmetry of the graph.[1 mark]
  4. 6(d)(ii)Estimate the minimum value of the function y.[1 mark]
  5. 6(d)(iii)State the values of the solutions of the equation: x² – 2x – 3 = 0.[1 mark]

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