Simple regression is a statistical method used to determine the relationship between two variables- a dependent variable and an independent variable where the dependent variable is predicted using the independent variable. There are several synonyms for the term "simple regression" which include linear regression, univariate regression, and single regression. Linear regression refers to a type of regression analysis that focuses on linear relationships between the two variables. Univariate regression refers to a single dependent variable, while single regression refers to a single independent variable. These terms are used interchangeably to describe the simple regression analysis technique and are commonly used by statisticians and researchers to predict relationships between variables.