Higher
21st November 1977
- 1Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 224 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 2Surds2 marks
Write sqrt(72) in the form a sqrt(b), where b is as small as possible.
- 3Parallel and Perpendicular Lines3 marks
A line has equation y = -4x + 4. Work out the gradient of any line perpendicular to it.
- 4Repeated Percentage Change3 marks
A price rises by 10% and then falls by 20%. Work out the overall percentage change, to 2 decimal places.
- 5Enlarging with Negative Scale Factors3 marks
The point (2, 4) is enlarged by scale factor -2 about the centre (4, 4). 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 November 1977, including the monthly compilation PDF.