散点图

在散点图上绘制双变量数据，坐标轴标注正确且比例合适；描述相关性（正相关、负相关、无相关），并在适当情况下画出估计的最佳拟合线。

Plot bivariate data on a scatter graph with correctly labelled axes and appropriate scales; describe the correlation (positive, negative, none) and draw an estimated line of best fit where appropriate

学习证据 / Evidence

• 在散点图上绘制10个数据点，坐标轴标注正确且刻度一致。
• 用眼睛画一条最佳拟合线，确保线上方和下方的点数大致相等。
• 利用最佳拟合线，在数据范围内根据给定的x值估计对应的y值。

• Plot 10 data points on a scatter graph with correct axis labels and a consistent scale
• Draw a line of best fit by eye, ensuring roughly equal numbers of points above and below
• Use the line of best fit to estimate a y-value for a given x-value within the data range

评估问题 / Assessment

如果{{name}}有10名学生的睡眠时长与考试成绩数据，能否在散点图上标出各点、画出最佳拟合线，并用它预测一名睡眠7小时学生的考试成绩？

If {{name}} has data comparing hours of sleep and test scores for 10 students, can they plot the points on a scatter graph, draw a line of best fit, and use it to predict a score for someone who slept 7 hours?