Question

a market supply schedule shows
the products of two companies only.
the prices and quantity in an entire market.
how prices affect a single producer.
how prices affect a group of consumers.

Explanation:

A market supply schedule is about the supply side of the market (not consumers) and encompasses the entire market (not just two companies or a single producer). It lists the quantities of a good or service that all producers in a market are willing to supply at different prices. So it shows the prices and quantity in an entire market.

Answer:

the prices and quantity in an entire market.