The sterplot has 11 data points. The data points are in a linear pattern trending up from left to right.

Question

The sterplot 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?

Accepted Answer

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 loed below the line of best fit. For the sterplot 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.

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