Higher
27th January 1979
- 1Box Plots2 marks
A box plot has minimum 2, lower quartile 8, median 15, upper quartile 22 and maximum 29. Work out the interquartile range.
- 2Reverse Percentages3 marks
A bill is £888 including VAT at 20%. Work out the amount before VAT.
- 3Parallel and Perpendicular Lines3 marks
A line has equation y = -4x + 4. 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 = 5, y = 125. Work out y when x = 2.
- 5Enlarging with Negative Scale Factors3 marks
The point (6, -5) is enlarged by scale factor -3 about the centre (0, 1). Write down the coordinates of the image.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1979, including the monthly compilation PDF.