The cost of cheese at three stores is a function of the weight of the cheese. The cheese
is not prepackaged, so a customer can buy any amount of cheese.
• Store A sells the cheese for a dollars per pound.
.
Store B sells the same cheese for b dollars per pound and a customer has a coupon
for $5 off the total purchase at that store.
• Store C is an online store, selling the same cheese at c dollar per pound, but with a
$10 delivery fee.
This graph shows the price functions for stores A, B, and C.