If both rich and poor families pay 25 percent of their income in taxes, the tax scheme is ________.
A) proportional
B) regressive
C) negative
D) progressive
Question 2
In the above figure, if the budget line shifts from RT to RS, the substitution effect is illustrated by the move from
A) a to b.
B) a to c.
C) b to c.
D) T to S.