Chapter 17, Problem 5P

Using the same approach as was employed to derive Eqs. (17.15) and (17.16), derive the least-squares fit of the following model:

$y=a_{1}x+e$

That is, determine the slope that results in the least-squares fit for a straight line with a zero intercept. Fit the following data with this model and display the result graphically:

x	2	4	6	7	10	11	14	17	20
y	1	2	5	2	8	7	6	9	12