The estimated market demand of a commodity X is given as Q=70-3.5P-0.6M+4Pz, where Q=Estimated units of X demanded, P=Price of the goods, M= Money income and Pz= Price of related goods.
Find out;
1. if Xis a normal good or an inferior good and explain;
2. Are commodities X and Z substitutes or compliments?
3. At P=10, M=30 and Pz=6, compute the estimate for own-price and cross elasticity