Explain the concept of substitute goods and their demand relationship, including an example and a graphical representation.

Here's the explanation for question 2:

Substitute goods are products that can be used in place of each other to satisfy the same want or need. Consumers perceive them as similar enough that they can switch between them based on factors like price.

The demand relationship for substitute goods is direct or positive. This means that if the price of one substitute good increases, the demand for the other substitute good will increase, as consumers switch to the relatively cheaper alternative. Conversely, if the price of one substitute good decreases, the demand for the other substitute good will decrease. For example, if the price of coffee rises significantly, consumers might switch to tea, increasing the demand for tea.

A relevant graphic would show two separate demand curves, one for each substitute good. If we consider Good A and Good B as substitutes, an increase in the price of Good A (represented by an upward movement along Good A's demand curve) would lead to a rightward shift of the demand curve for Good B. This rightward shift indicates an increase in the quantity demanded for Good B at every price level, as consumers substitute Good B for the now more expensive Good A.