In a Multiple Regression Model, the Value of the Coefficient $- 1$

Short Answer

In a multiple regression model, the value of the coefficient of multiple determination a) has to fall between $- 1$ and $+ 1$ .
b) has to fall between 0 and $+ 1$ .
c) has to fall between $- 1$ and 0 .
d) can fall between any pair of real numbers.