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2.2.2 Scatter diagrams and correlation

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Question 1

67%

Tony is investigating the relationship between his daily energy bill in pounds ( $e$ ) and the average daily temperature in degrees ( $t$ ) each day in the winter.

He finds that the equation of the regression line is $e = 7.3 - 0.4 t$

Describe the correlation between Tony's bill and the average daily temperature.

[1]

Give an interpretation of the gradient of this regression line.

[1]

Explain why this model might not be appropriate for Tony's energy bill in the summer.

[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

Question bank

2.2.2 Scatter diagrams and correlation

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Question 1

67%

Tony is investigating the relationship between his daily energy bill in pounds ( $e$ ) and the average daily temperature in degrees ( $t$ ) each day in the winter.

He finds that the equation of the regression line is $e = 7.3 - 0.4 t$

Describe the correlation between Tony's bill and the average daily temperature.

[1]

Give an interpretation of the gradient of this regression line.

[1]

Explain why this model might not be appropriate for Tony's energy bill in the summer.

[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.