👉 Regressions are mathematical relationships between two variables that tend to increase or decrease as one variable increases and another variable decreases. These relationships can be used in various fields, such as economics, biology, psychology, and social sciences. The term "regression" is derived from the Latin word "regressio," which means "to return." In mathematics, a regression model describes how changes in one variable (the dependent variable) affect another variable (the independent variable). For instance, if we have