1988 AMC 12 第 4 题
先试着解答 1988 AMC 12 第 4 题，然后核对你的答案与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 1988 AMC 12 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
4.
直线 的斜率为
The slope of the line is
答案：B
小提示：
从方程中解出
Solve the equation for
大提示：
在 中，系数 就是斜率
In the coefficient is the slope
解答：
将原方程乘以 ，再整理 所在的项，得到 。斜率为 。
所以正确答案是 B。
Multiplying by after isolating gives The slope is
Thus the correct answer is B.
其他年份的第 4 题
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