Each "x" on the number line seems to represent a tree that sap has been collected from. That's 15 trees. Furthermore, you know that the total amount of sap is 8 gallons, because it's stated in the question. To get the amount of sap that would be collected from each tree if it had been distributed equally (also known as the <em>average</em> amount of sap collected from each tree), just do exactly that. Mathematically, this means you would divide the 8 gallons by 15 trees, or 8 ÷ 15. The total amount of sap collected is equivalent to an average of eight fifteenths of a gallon per tree. Hope that helps c:
