What is the term for a relationship between two variables in which they move in the same direction?

A positive correlation refers to a situation where two variables change in the same direction. As one variable increases, the other variable also increases, and similarly, if one decreases, the other decreases as well. This type of relationship indicates that the variables are directly related in terms of their movement or behavior.

For example, if you were to consider the relationship between hours studied and scores on an exam, it is likely that as the number of hours studied increases, the exam scores would also tend to increase. This consistent pattern where both variables rise or fall together exemplifies a positive correlation.

The other options describe different types of relationships that do not fit the criteria for this particular scenario. Negative correlation indicates an inverse relationship where one variable increases as the other decreases, no correlation denotes a lack of relationship between the two variables, and inverse correlation is a synonym for negative correlation. In contrast, positive correlation clearly captures the notion of variables moving in unison.