A Neaative relation between the price of one product and the demand for another holds for all 16 : l) 2) substitute 3) goods 4) infuiu goods In consumer demand theory, income elasticity of demand is regarded as l) always 2) always 3) 4) to c.pt of Eco profit of under roil of under competlti 1) 2) 3) 4) n of fi profit of fims und