Question 5 — IGCSE 0580 Oct/Nov 2024 Paper 31
Cambridge IGCSE Mathematics 0580, Core tier, calculator. Topic: Statistics · Scatter diagrams. Worth 13 marks.
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Question text
5 (a) The scatter diagram shows the distance travelled and the cost for each of 12 taxi journeys.
25
20
15
Cost ($)
10
5
0
0 2 4 6 8 10
Distance (km)
(i) ‘The scatter diagram shows positive correlation.’
Is this statement true or false?
Give a reason for your answer.
................ because ...............................................................................................................
............................................................................................................................................. [1]
(ii) On one journey, the cost per kilometre travelled was much more expensive than on all of the
other journeys.
Draw a ring around this point on the scatter diagram. [1]
(iii) Draw a line of best fit on the scatter diagram. [1]
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(iv) Another journey is 8 km long.
Use your line of best fit to find an estimate for the cost of this journey.
$ ................................................. [1]
(b) Arit, Luke and Marie share the cost of a taxi journey.
The cost is $26.40 .
(i) Calculate how much Arit pays if they share the cost equally.
$ ................................................. [1]
(ii) They decide to share the cost in proportion to the distance they each travel in the taxi.
Arit travels 12 km, Luke travels 3 km and Marie travels 7.5 km.
(a) Write the ratio 12 : 3 : 7.5 in its simplest form.
................ : ................ : ................ [2]
(b) Calculate how much more Arit pays than if they share the cost equally.
$ ................................................. [3]
(c) Jin invests some money from his taxi company.
He invests $18 600 at a rate of 1.7% per year compound interest.
Calculate the value of the investment at the end of 6 years.
Give your answer correct to the nearest dollar .
$ ................................................. [3]
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