Covariance

Covariance is a statistical measure that indicates the degree to which two variables change together. If they tend to increase or decrease simultaneously, the covariance is positive; if one increases while the other decreases, the covariance is negative. It helps illustrate the relationship between the variables—whether they are related and how they move in relation to each other. However, covariance doesn't provide information about the strength of this relationship or its cause. It is often used in finance, science, and data analysis to assess how different factors influence one another.