Rob consumes two goods, x and y. He has an allowance of $50 per week and is not endowed with either of the goods. If the price of good x increases and his substitution and income effects change demand in opposite directions, Group of answer choices WARP is violated. good x must be a normal good. good x must be an inferior good. good x must be a Giffen good. There is not enough information to judge whether good x is a normal or inferior good.