Select students from the class and use their individual demand curve data to complete the table. Then challenge them to use the table to draw the market demand curve graph.

Movement along the line

Once the market demand curve has been plotted it is fairly straight-forward to ask how many bottles will be sold when the price is X, the price is Y etc., and this can lead a formal discussion about movement along the demand curve.
Student Name: Max Price (£) willing to pay for the
for 1st glass for 2nd glass for 3rd glass for 4th glass
Enter Name 1 (blue)
0
0
0
0
Enter Name 2 (black)
0
0
0
0
Enter Name 3 (green)
0
0
0
0
Enter Name 4 (orange)
0
0
0
0