Write a heading on top of one of your pieces of notebook paper, (Wheat) Demand Schedule. There will be two columns in this table. Atop the left column, write "Prices per bushel." Atop the second column write "Quantity demanded."
According to the laws of supply and demand, consumers will demand higher quantities of wheat at lower prices than at higher prices. The first column, from top to bottom, might read: $12, $10, $8, $6, and $4. The second column might then read (in millions of bushels); 10, 11, 12, 13, and 14.
Your table will now look like this:
$12 10
$10 11
$8 12
$6 13
$4 14
Write at the top of a second piece of paper, "(Wheat) Supply Schedule."
Again, there will be two columns. These will be headed, "Prices per bushel" and "Quantity supplied."
In this case, the laws of supply and demand dictate that farmers will be willing to supply more wheat at higher prices than at lower ones. The first column, from top to bottom, should use the same numbers as the first column of the Demand Schedule. The second column should have numbers (again in millions of bushels) that descend in quantity from top to bottom. Perhaps 14, 13, 12, 11, and 10.
Use you graph paper to represent both lines. The quantity (demanded or supplied) will be the x-axis of your graph, the proposed price will be the y-axis.
Use different colors of ink (or magic marker) to represent the demand and supply curves. Given the hypothetical numbers above, the two lines will intersect where x is 12 million bushels and the y is $8 a bushel.