Table 4-13
The demand schedule below pertains to sandwiches demanded per week.
-Refer to Table 4-13. Suppose x = 1. Then the slope of the market demand curve is

Question

Table 4-13
The demand schedule below pertains to sandwiches demanded per week. 
-Refer to Table 4-13. Suppose x = 1. Then the slope of the market demand curve is

Quizplus · Accepted Answer

Using the method of differences, we can see that the slope of the demand curve is constant and equal to 3. The difference between the sandwich demand for x=1 and x=2 is -3, and this is true for every consecutive pair of values in the table. Therefore, the slope of the market demand curve is 3.

Table 4-13 The Demand Schedule Below Pertains to Sandwiches Demanded Per Week