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. a. good x must be a Giffen good.
b. good x must be an inferior good.
c. WARP is violated.
d. good x must be a normal good.
e. There is not enough information to judge whether good x is a normal or inferior good.

B

Explanation:

Inferior good is a good whose demand decreases when income increases

The substitution effect looks at the change in price of a good relative to other goods.  When the price of good x increases, rob should increase consumption of good y and reduce that of good x if it were a normal good

The income effect looks at how a change in price affects real disposable income

d. low interest rates

none

explanation:

we're are the selections to pick from?