However the mark scheme says that a scatter graph is used -
"(Because) looking at relationship between two discrete/independent variables"
Surely the data is continuous though because both variables are percentages, not integers. Moreover, we don't know that the two variables are independent since one could be dependent on the other with a causal relationship. Am I wrong or misinterpreting the mark scheme or does it, being a specimen paper, have a mistake?
The question is 9.2 of https://filestore.aqa.org.uk/resourc...-74022-SQP.PDF