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2.2 L: Data presentation and interpretation

2.2 L: Data presentation and interpretation

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Question 6

A motoring magazine records the engine capacity x x\,x litres and the CO2 _2\,2​ emission y y\,y g/km of 30 cars. The equation of the regression line of y y\,y on x x\,x is

y=92+46xy = 92 + 46xy=92+46x

a.

Give an interpretation of the value 46 in this equation.

[1]
b.

Explain why the value 92 has no practical meaning for these cars.

[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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