Ononot — A scatter plot of N=500 points has a regression line \hat{y}

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Data Visualizationhard

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A scatter plot of $N=500$ points has a regression line $\hat{y} = 2.5x + 10$ . If the sum of squared errors (SSE) is $1200$ and the total sum of squares (SST) is $4000$ , which of the following are correct?