What characterizes a positive correlation?

A positive correlation describes a relationship between two variables where they move in the same direction. Specifically, when one variable increases, the other variable also increases; likewise, when one decreases, the other decreases as well. This indicates that both variables are related in such a way that changes in one variable are associated with changes in the other in the same direction.

For instance, if we consider the relationship between hours studied and test scores, typically, as the number of hours studied increases, the test scores also tend to increase. This reinforces the concept of a positive correlation, illustrating how both variables align in their movements.

In this context, the options that suggest different dynamics, such as one variable decreasing when another increases or the idea that there is no relationship between the two, do not accurately define a positive correlation. They highlight relationships that do not maintain the same directional movement, which is essential for understanding what constitutes positive correlation.