Multi-linear regression is a generalisation of linear regression for when there are several independent variables that together can be used to predict a dependent varibale. While simple linear regression creates an equation iof the form y=mx+c, the result of multi-linear regression is of the form:
y = m1x1 + m2x2 + m3x3 + ... + c,
where x1, x2, x3, ... are the independent variables, y is the dependent variable to be predicted and m1, m2, m3, ... together with c are constants fitted by the method.
Used in Chap. 7: page 98