The demand for good X is given by: QDx = 6,000 - 0.5Px - PY + 9Pz + 0.1M
Research shows that the prices of related goods are given by PY=$6,500 and PZ=$100, while the average income of individuals consuming this product is M=$70,000.
Indicate whether goods Y and Z are substitutes or complements for good X.
Is X an inferior or a normal good?
How many units of good X will be purchased when Px = $5,230?
