补充材料04

emmahe

4.   In Millington, a city of 50,000 people, Mercedes Pedrosa, a realtor, calculated that a family with Millington’s median family income, $28,000 a year, could afford to buy Millington’s median-priced $77,000 house. This calculation was based on an 11.2 percent mortgage interest rate and on the realtor’s assumption that a family could only afford to pay up to 25 percent of its income for housing.

Which of the following corrections of a figure appearing in the passage above, if it were the only correction that needed to be made, would yield a new calculation showing that even incomes below the median family income would enable families in Millington to afford Millington’s median-priced house?

(A) Millington’s total population was 45,000 people.

(B) Millington’s median annual family income was $27,000.

(C) Millington’s median-priced house cost $80,000.

(D) The rate at which people in Millington had to pay mortgage interest was only 10 percent.（D）

(E) Families in Millington could only afford to pay up to 22 percent of their annual income for housing.

这道题实在是不只该如何思考？

robertchu

To answer this question, you need to have some basic knowledge of how mortgage (按揭贷款买房）works, then you will find that it's actually a pretty easy question.

Roughly, in the context of this question,

monthly mortgage payment = 25% * monthly income, and

monthly mortgage payment = function (total price of the house, mortgage interest rate)