O-LevelMathematicsStatistics4024/22 · May/June 2021 · Q25 Marks
The table shows the midday temperature and the number of cups of hot chocolate Natcha sells on each of ten days. Midday temperature (°C) 18 9 4 28 15 21 6 5 12 23 Number of cups of hot chocolate 7 15 22 2 12 8 17 21 16 6
- (a)Complete the scatter diagram. The first 5 points have been plotted for you.[2]
- (b)Describe the relationship between the midday temperature and the number of cups of hot chocolate Natcha sells.[1]
- (c)By drawing a line of best fit, estimate the number of cups of hot chocolate sold when the midday temperature is 17°C.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [2] (a) B1 for 3 or 4 correct plots
- [1] (b) Temperature increases cups of hot chocolate sold decreases oe
- [2] (c) Ruled line of best fit B1 Strict FT – must be an integer from a line with a negative gradient
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