Graphic Regression Lines

It is quite easy to graph the regression lines once they have bee computed. All one has to do is to:
 
(a)    choose any two values (preferably well apart) for the unknown variable on the right-hand side of the equation,

(b)    compute the other variable,

(c)    plot the two pairs of values, and

(d)    draw a straight line through the plotted points.

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