In order to prove that Coca Cola and 7-Up are substitutes, one should test the __________ and get a __________.
a. price elasticity of demand; number less than negative 1
b. income elasticity; positive number
c. cross-price elasticity; negative number
d. price elasticity of demand; number greater than negative 1
e. cross-price elasticity; positive number
Question 2
Computers and software programs are
a. inferior goods
b. complementary goods
c. goods with a cross-price elasticity of demand of 0
d. substitute goods
e. perfectly elastic goods
