Examine the procedure in equations (4.13) through (4.15).

(a) The term a is essentially inert throughout this procedure. Why?

(b) Imagine applying this procedure to the sum of squared errors in equation€(

11.15). Considering the answer to part

a, what is likely to happen to a?

(c) Consider the role of bâ•›2x2i in equation (11.15). It has an important similarity to the role of

a. What is it? If we apply the procedure of equations€(4.13) through (4.18) to the sum of squared errors in equation€(

11.15), what is likely to happen to bâ•›2x2i?

(d) Apply this procedure to the sum of squared errors in equation (11.15) to derive equation (11.20).

(e) How should we modify the procedure of part d to obtain the third derivative of equation (11.15),

(fâ•›) Set the derivative in part e equal to zero and derive equation (11.25).

Transcribed Image Text:

(2) i=1 ab 2 (y; (a + b x; + b x 2 )) x2;?