Reasoning A store sells packages of comic books with a poster. A poster and 6 comics cost $13.99. A poster and 13 comics cost $20.99. Write a linear function rule that models the cost y of a package containing any number x of comic books.
Suppose another store sells a similar pakage, modeled by a linear function rule with initial value $8.75. Use pencil and paper. Explain which store has the better deal.
The linear function rule is y=
