Doroteo determined that the correlation coefficient for a set data was -0.9. what percent of the total variation in the y-values is not explained by the regression line?

19% of the total variation in the y-values is not explained by the regression line

Step-by-step explanation:

The correlation coefficient, r, is a measure of the degree of association between two variables. It gives information on the direction and strength of the relationship.

On the other hand, is the coefficient of determination and is a measure of the percent of the total variation in the y-values explained by the regression line.

is simply the square of r;

This implies that 81% of the total variation in the y-values is explained by the regression line. Therefore, only 19% is not explained.