#### Answer

1

#### Work Step by Step

(a,b) and (-b ,-a)
x1=a,y1=b,x2=-b,y2=-a
Using slope formula
m = $\frac{y2-y1}{x2-x1}$
m= $\frac{-a-b}{-b-a}$ = 1

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Published by
Brooks Cole

ISBN 10:
9781285195698

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