PRICE Dollars per pou 1 0 1 2 3 There are 4 5 6 SCREWS Pounds 7 8 9 10 Each small square in the grid for this graph has one side equal to 1 pound of screws and one side equal to 1 dollar per pound The area of one small square is therefore 35 small squares in the purple shaded rectangle On this graph the area of the purple rectangle corresponds to O King Hardware s revenue from selling screws measured in dollars O The price of the screws measured in dollars per pound O The number of screws that King Hardware sold measured in pounds O None of these the area has no meaning Now suppose King Hardware raises its price to 6 00 per pound of screws As a result it now sells 5 pounds of screws