The demand Curve is given by
Qd = 250 - 2.5PX - 0.25I - 5PY + PZ
Where
Qd is the quantity demanded of good X
Px is the price of good X
I = Consumer income, in thousansds
Py = price of good Y
Pz = price of good Z
a. Based on the demand curve above, is X a normal or an inferior good? Why?
b. Based on the demand curve above, what is the relationship between good X and good Y? How did you determine that?
c. Based on the demand curve above, what is the relationship between good X and good Z? How did you determine that?
d. What is the equation of the demand curve if consumer incomes are $30k (input 30 in the demand equation since income is measured in thousands), the price of Y is $10, and the price of good Z is $20.