#### Answer

(a) $C=9+1.5x$
(b) $\$15$

#### Work Step by Step

(a) The cost consists of the flat cost of $\$9$ and the topping cost of $\$1.5$ per topping:
$C=9+1.5x$
(b) We have 4 toppings, so the cost is:
$C=9+1.5(4)=\$15$

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

(a) $C=9+1.5x$
(b) $\$15$

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