#### Answer

a. y=-50x + 700
b. 325

#### Work Step by Step

a. $(10,200), (9,250 ) =\gt \frac{250-200}{9-10}=\frac{50}{-1}=-50$
$y=-50x+b =\gt 200=-50\times10 +b \lt=\gt b = 700$
b. x=7.5 , y=325

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

a. y=-50x + 700
b. 325

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