Higher
31st October 1981
- 1Box Plots2 marks
A box plot has minimum 9, lower quartile 18, median 22, upper quartile 32 and maximum 37. Work out the interquartile range.
- 2Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.888... as a fraction in its simplest form.
- 3Parallel and Perpendicular Lines3 marks
A line has equation y = 2x + 5. Work out the gradient of any line perpendicular to it.
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 6, y = 72. Work out y when x = 4.
- 5Enlarging with Negative Scale Factors3 marks
The point (6, -3) is enlarged by scale factor -1 about the centre (1, -3). Write down the coordinates of the image.
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