1. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. Objectives To understand and use the term ‘correlation’.

2. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. Correlation Measures the strength of the connection between the x and y values.

3. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. Most of the points are pretty close to the line (a ‘line of best fit’). This is a strong correlation because the connection between the x and y values is very clear. Correlation Measures the strength of the connection between the x and y values.

4. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. This is a positive correlation because an increase in one value means an increase in the other. The points are spread between bottom left and top right. Correlation Measures the strength of the connection between the x and y values.

5. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. This is a negative correlation because an increase in one value means a decrease in the other. The points are spread between top left and bottom right. Correlation Measures the strength of the connection between the x and y values.

6. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. This is a weak correlation because the connection between the x and y values is not immediately obvious. Higher x values do seem to show lower y values, so there is a weak negative correlation. Correlation Measures the strength of the connection between the x and y values.