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Problem-Solving and Data Analysis / Two-variable data: Models and scatterplots Difficulty: Medium

The scatterplot shows the relationship between two variables, $x$ and $y$ . A line of best fit is also shown. For how many of the $11$ data points does the line of best fit predict a greater $y$ -value than the actual $y$ -value?

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Explanation

The correct answer is $6$ . The line of best fit predicts a greater y-value than the actual y-value for any data point that's located below the line of best fit. For the scatterplot shown, $6$ of the data points are below the line of best fit. Therefore, the line of best fit predicts a greater y-value than the actual y-value for $6$ of the data points.