Posted by **Terri** on Friday, January 25, 2013 at 12:03am.

Hobbies: A book club charges a membership fee of $20 and then $12 for each book purchased.

a. Write and graph a function to represent the cost y of membership in the club based on the number of books purchased x.

b. what if...? Write and graph a second function to represent the cost of membership if the club raises its membership to $30.

c. Describe the relationship between your graphs from parts a and b.

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