For a large sample of cars there is strong positive correlation between a car's CO emission and its CO2 _2\,2 emission.
Identify the only statement below that this correlation supports.
Circle your answer.
A high CO2_22 emission causes a high CO emission
Cars with a high CO2_22 emission tend to have a high CO emission
Reducing a car's CO2_22 emission will reduce its CO emission
CO2_22 emission and CO emission are the same quantity
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.