Discussion
Two variables are said to be correlated if :
Answer: A
Two variables are correlated if a change in one variable results in a corresponding change in the other.
Correlation means the two variables move together. The movement may be in the same direction (positive correlation, such as height and weight) or in opposite directions (negative correlation, such as price and demand), and its strength is measured by the correlation coefficient.
Option B describes only negative correlation, so it is too narrow. Whether the variables are similar or dissimilar in nature has nothing to do with correlation; it is their changes that must correspond.
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