Practise Edexcel AS Level Maths Correlation with exam-style questions for AS Level Maths. 5 questions covering 4.1 Correlation and 4.2 Linear Regression, matched to the Edexcel AS Level Maths (8MA0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.