Regression analysis is the use of statistical methods for modeling a set
of dependent variables, Y, in terms of combinations of predictions, X.
It includes methods such as multiple linear regression (MLR) and
partial least squares (PLS).

Source:

PAC, 1997, *69*, 1137*
(Glossary of terms used in computational drug design (IUPAC Recommendations 1997))
* on page 1149