Higher
2nd April 1991
- 1Parallel and Perpendicular Lines3 marks
A line has equation y = 3x + 3. Work out the gradient of any line perpendicular to it.
- 2Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 5 : 8. Write y in terms of x.
- 3Enlarging with Negative Scale Factors3 marks
The point (0, 5) is enlarged by scale factor -3 about the centre (-1, -4). Write down the coordinates of the image.
- 4Venn Diagrams3 marks
In a Venn diagram, 10 are in A only, 11 in B only, 5 in both and 4 in neither. Work out the probability a random one is in both.
- 5Capture Recapture3 marks
10 voles are marked and released. Later 40 are caught, of which 5 are marked. Estimate the population.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1991, including the monthly compilation PDF.