Higher
13th November 1980
- 1Parallel and Perpendicular Lines3 marks
A line has equation y = -5x + 8. Work out the gradient of any line perpendicular to it.
- 2Repeated Percentage Change3 marks
A town's population is 27500 and grows by 5% each year. Work out the population after 6 years, to the nearest whole number.
- 3Enlarging with Negative Scale Factors3 marks
The point (2, 4) is enlarged by scale factor -1 about the centre (0, 3). Write down the coordinates of the image.
- 4Venn Diagrams3 marks
In a Venn diagram, 12 are in A only, 4 in B only, 11 in both and 1 in neither. Work out the probability a random one is in both.
- 5Histograms2 marks
A histogram class is 20 units wide and contains 30 values. Work out the frequency density.
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