SAT备考 - 每日一题（40）统计题：看图说话

The scatter plot and trend line plot the relationship between how early students turned in an exam (measured by minutes left in the exam) and their exam scores. Assuming the line correctly shows the trend in the data, what does it mean that the line's y-intercept is 87? 散点图和趋势线描述的是学生交卷时间（以距离考试结束时间还剩下多少分钟计，横轴x）与他们的考分（纵轴y）之间的关系。假设这条趋势线是正确的，那么，这条线与纵轴y的交差点87说明了什么？ 散点图：scatter plot 趋势线：trend line 截距：intercept