The "law of demand" is described as a "law" because, like the law of gravity, it describes a predictable pattern in how
our world works. Let's say you've decided to buy a shirt you really like because it's on sale. In fact, because this price is
so good, you decide to buy two shirts in different colors. What would be the benefit to you of doing this? Why do you
think that, over and over again, people are more likely to buy something (or more of something) when the price is
lower? In your answer, discuss a real life example.