A correlation identifies variables and looks for a relationship between them. An experiment tests the effect that an independent variable has upon a dependent variable but a correlation looks for a relationship between two variables.:max_bytes(150000):strip_icc()/Correlation_coefficient-56a792873df78cf77297414e.png)
A correlation is an indication of a linear relationship between two variables. Learn about what positive, negative, and zero correlations mean and how they're used.
Positive correlation is a relationship between two variables in which both variables move in the same direction. This is when one variable increases while the other increases and visa versa. For example, positive correlation may be that the more you exercise, the more calories you will burn.