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2.2 L: Data presentation and interpretation

2.2 L: Data presentation and interpretation

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Question 48

Ellie investigates the relationship between the fuel economy x x\,x miles per gallon and the CO2 _2\,2​ emission y y\,y g/km of 25 petrol cars. She finds that the equation of the regression line of y y\,y on x x\,x is

y=310−3.4xy = 310 - 3.4xy=310−3.4x

a.

Describe the correlation between fuel economy and CO2 _2\,2​ emission.

[1]
b.

Give an interpretation of the gradient of this regression line.

[1]
c.

Explain why this model would not be appropriate for a fully electric car.

[1]
Markscheme

2.2 L: Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 L: Data presentation and interpretation

244 exam-style questions on AQA A Level Maths 2.2 L: Data presentation and interpretation, covering 2.2.1 Single-variable data diagrams, 2.2.2 Scatter diagrams and correlation, 2.2.3 Central tendency, variation and standard deviation, 2.2.4 Outliers and cleaning data, and 2.2 L: Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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