Which of the following statements about least squares regres

Which of the following statements about least squares regression is FALSE:

A. The procedure is essentially an optimization problem.

B. Solution os a set of simultaneous linear equations may be required.

C. The solution for the best fit model coeddicients may not be unique.

D. The procedure can be applied to both linear and nonlinear models.

Solution

It is optimization problem.and for linear case solution is unique but for nonlinear it may not be unique.

so option B is false.