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2.2 L: Data presentation and interpretation

2.2 L: Data presentation and interpretation

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Question 10

For the 25 petrol cars in Ellie's investigation, the fuel economies ranged from 25 mpg to 55 mpg, and the regression line of CO2 _2\,2​ emission y y\,y g/km on fuel economy x x\,x mpg was

y=310−3.4xy = 310 - 3.4xy=310−3.4x

a.

Use the regression line to estimate the CO2 _2\,2​ emission of a car with a fuel economy of 40 mpg.

[2]
b.

Comment on the reliability of your estimate, giving a reason.

[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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