Math
posted by Terri on .
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.

a. y = 12x + 20
Cannot graph here.
b. y = 12x + 30