Higher
26th October 1979
- 1Parallel and Perpendicular Lines3 marks
A line has equation y = -3x + 1. Work out the gradient of any line perpendicular to it.
- 2Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 6, y = 18. Work out y when x = 10.
- 3Enlarging with Negative Scale Factors3 marks
The point (2, 1) 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, 13 in B only, 2 in both and 6 in neither. Work out the probability a random one is in both.
- 5Capture Recapture2 marks
A capture-recapture estimate is made of the newt population of a stream. State one assumption the method relies on.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1979, including the monthly compilation PDF.