Afrozen yogurt shop offers a rewards system for frequent customers. the graph below represents how much a rewards customer pays based on the number of ounces of frozen yogurt purchased.

which statement describes the total amount a rewards customer pays for 10 ounces and 12 ounces of yogurt?

a rewards customer earns 2 free ounces of yogurt because the total amount paid for 10 ounces and 12 ounces is the same.
a rewards customer pays $5 per ounce because the total amount paid is always increasing.
a rewards customer pays $20 for 10 or 12 ounces of yogurt because the total amount paid is increasing.
a rewards customer earns 5 free ounces of yogurt because the total amount paid for 10 ounces and 12 ounces is the same.