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2.2.2 Scatter diagrams and correlation

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Question 3

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

$y = 92 + 46 x$

Give an interpretation of the value 46 in this equation.

[1]

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

[1]

Markscheme

2.2.2 Scatter diagrams and correlation Questions

A Level
Maths
2.2.2 Scatter diagrams and correlation

157 exam-style questions on AQA A Level Maths 2.2.2 Scatter diagrams and correlation. Each one has a worked solution and a mark scheme showing where the marks go.

2.2.2 Scatter diagrams and correlation

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2.2.2 Scatter diagrams and correlation

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Question 3

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

$y = 92 + 46 x$

Give an interpretation of the value 46 in this equation.

[1]

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

[1]

Markscheme

2.2.2 Scatter diagrams and correlation Questions

A Level
Maths
2.2.2 Scatter diagrams and correlation

157 exam-style questions on AQA A Level Maths 2.2.2 Scatter diagrams and correlation. Each one has a worked solution and a mark scheme showing where the marks go.