a. What is a residual? b. In what sense is the regression line the straight line that "best" fits the points in a scatterplot? .... a. What is a residual? A. A residual is a point that has a strong effect on the regression equation. OB. Aresidual is the amount that one variable changes when the other variable changes by exactly one unit. OC. A residual is a value of y-y, which is the difference between an observed value of y and a predicted value of y. D. Aresidual is a value that is determined exactily, without any eror. b. In what sense is the regression line the straight line that "best fits the points in a scatterplot? The regression line has the property that the of the residuals is the possible sum. sum sum of squares

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