Ononot — A scatter plot shows N=100 points. The regression line is y

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Data Visualizationhard

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A scatter plot shows $N=100$ points. The regression line is $y = 0.5x + 10$ . If the sum of squares of residuals is $SS_{res} = 400$ and the total sum of squares is $SS_{tot} = 1000$ , what is the Pearson correlation coefficient $r$ ?