# What is the difference between univariate and multivariate regression analysis?

The most basic difference is that univariate regression has one explanatory (predictor) variable $x$ and multivariate regression has more at least two explanatory (predictor) variables ${x}_{1} , {x}_{2} , \setminus \ldots , {x}_{n}$. In both situations there is one response variable $y$. Let me know if you want more detail.