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QUESTION
The supply curve is given by QS = 200+20 PX 5 PI +0.
The supply curve is given by
QS = −200+20PX −5PI +0.5PZ
where
QS = quantity supplied of good X PX = price of good X
PI = price of inputs to good X PZ = price of good Z
Based on the supply curve above, what is the relationship between good X and good Z?
Are they substitutes or complements and why?
