Governments frequently limit how much of a good a consumer can buy. During emergencies, governments may ration "essential" goods such as water, food, and gasoline rather than let their prices rise. Suppose that the government rations water, setting quotas on how much a consumer can purchase. If a consumer can afford to buy 12,000 gallons a month but the government restricts purchases to no more than 10,000 gallons a month, how do the consumer's budget line and opportunity set change?