## Quick Reference

A mathematical model represented by a linear equation of the form *Y* = *b*_{1}*X*_{1} + *b*_{2}*X*_{2} + … + *b*_{n}*X** _{n}*, or by a system of such linear equations. The relationship between the variables in a linear equation is a straight line when plotted on a graph. In multiple regression,

*Y*represents the estimated value of the dependent variable, each of the

*X*

*represents a predictor variable, and the*

_{i}*b*

*are regression coefficients or weights. If they are expressed as standardized regression coefficients, then they are represented by the Greek letter beta (β) instead of*

_{i}*b*and are called beta weights. See also bootstrapping.

**From:**
linear model
in
A Dictionary of Psychology »

*Subjects:*
Psychology.

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