posted by plz help .
Two part question: Suppose a market research company finds that at a price of p=$25, they would sell x=56 tiles each month. If they lower the price to p=$20, then more people would purchase the tile, and they can expect to sell x=66 tiles in a month's time. Finf the equation of the line for the emand equation. Hint: write answer in the form p-mx+b