BRAINCAKECorrelation and Causation
Correlation occurs between two variables when a change in one of the variables is reflected by a change in another variable.
Positive correlation is when an increase in one variable is accompanied by an increase in the other variable..
Negative correlation is when an increase in one variable is accompanied by an decrease in the other variable.
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All 28 lessons in Exchange of Gases · All AQA AS-level Biology topics