问题如下：
The equation that describes the IS curve is Y = 12,292.7 – 73.2r。
Given a real interest rate of 4 percent, find the level of GDP
选项：
A.11,999.9
12,890.8
C.9,996.3
解释：
If the real interest rate is 4 percent, then GDP and the components of GDP are: Y = 12,292.7 – 73.2(4) = 11,999.9
考点：IS curve
解析：如果实际利率为4%，则GDP及其组成部分为Y = 12,292.7 73.2(4) = 11,999.9
因此只有A正确。
这里面的利率不是4%吗？A的答案是按4计算的？
