A.The supply curve:

Group of answer choices

shows how much buyers are willing and able to buy at different prices.

is the amount that buyers are willing and able to buy at a particular price.

shows how much sellers are willing and able to sell at different prices.

is the amount that sellers are willing and able to sell at a particular price.

B. Demand slopes down because:

Group of answer choices

supply slopes up, and supply and demand must intersect.

consumers focus too much on the price of goods when they choose the quantity to demand.

goods usually have only a single use.

consumers will choose to use goods only in their most valuable uses when prices are high.