A demand curve:

1. shows the relationship between income and spending.

2. shows the relationship between price and quantity supplied.

3. indicates the quantity demanded at each price in a series of prices.

4. graphs as an upsloping line.

3. indicates the quantity demanded at each price in a series of prices.

Explanation:

The demand for a product can be described as the quantity that buyers are willing and able to buys at a given price or different prices. As per the law of demand, an indirect relationship exists between the price and demand for a product. This relationship can be expressed in a graph format known as a demand curve or as a table format known as the demand schedule.

A demand curve is downward sloping. It demonstrates how demand varies at different prices. A change in price cause movement along the demand curve. Low price results in high demand, while high prices result in low demand.