The following represents demand for widgets (a fictional product):
Q
D
=650-4P-0.004M+4P
R
where P
is the price of widgets, M
is income, and P
R
is the price of a related (fictional) good, the wodget. Supply of widgets is determined by
Q
S
=20+4P
Widgets are _________, and widgets and wodgets are _____________.
Select one:
a. an inferior good; substitutes.
b. an inferior good; complements.
c. a normal good; substitutes.
d. a normal good; complements.