Need answer
the graph shows a demand curve
what changes does the graph show?
a. an increase in demand
b. a decrease in demand
c. a stable demand and an increase in price
d. a decrease in both the quantity demanded and the quantity supplied

For this case, the first thing we will do is define the following functions:
 Function orange = D (x)
 Blue function = D1 (x)
 Let's see how one function varies with respect to the other:
 D1 (x) = D (x) - 2.5
 Therefore, we see that the function decreases.
 
 B. A decrease in demand