Final answer:
The supply chart tells us that as the price of the sandwich decreases, the quantity purchased increases.
Step-by-step explanation:
The supply chart tells us that as the price of the sandwich decreases, the quantity purchased increases. This is because of the law of demand, which states that as the price of a good or service decreases, the quantity demanded increases. In this case, as the price of the sandwich decreases, consumers are willing to buy more sandwiches, resulting in an increase in quantity purchased.