Question

select the option which best describes how market supply can be obtained. at each quantity supplied, prices of all sellers in the market are added. graphically, it means vertically adding up the individual supply curves. at each price, quantities supplied of all sellers in the market are added. graphically, it means horizontally adding up the individual supply curves. at each quantity supplied, prices of all sellers in the market are added. graphically, it means horizontally adding up the individual supply curves. at each price, quantities supplied of all sellers in the market are added. graphically, it means vertically adding up the individual supply curves.

Explanation:

Market - supply is derived by summing the quantities supplied by all sellers at each price level. Graphically, this is achieved by horizontally adding the individual supply curves.

Answer:

At each price, quantities supplied of all sellers in the market are added. Graphically, it means horizontally adding up the individual supply curves.