1. Demand Decreases - if the population in town decreases, the demand for goods and services will decrease as there are fewer people to buy them.
2. Does Not Count as Demand - Sue buying a new computer does not affect the overall demand for computers, it only affects the demand for that specific brand or model of computer.
3. Demand Increases - if the price of a popular brand of jeans decreases, the demand for jeans will increase as more people will be willing and able to buy them.
4. Does Not Count as Demand - Adam liking a new cell phone but not being able to afford it does not affect the overall demand for cell phones, as he is not able to purchase one.