Faaria wants to get some custom T-shirts printed for her basketball team. Shirts cost $10 each for the first 6 shirts and $5 each for every shirt over 6. What is the slope of the graph between 7 and 15 shirts?

Faaria wants to get some custom Tshirts printed for her basketball team Shirts cost 10 each for the first 6 shirts and 5 each for every shirt over 6 What is the class=