Suppose the correlation coefficient for a set of data is $r=0.910$. What is the coefficient of determination? How much of the variation is explained and how much is unexplained?

Coefficient of determination: $0.910$

$91.0\%$ explained, $9.0\%$ unexplained

Coefficient of determination: $0.828$

$82.8\%$ explained, $17.2\%$ unexplained

Coefficient of determination: $0.836$

$83.6\%$ explained, $16.4\%$ unexplained

Coefficient of determination: $0.721$

$72.1\%$ explained, $27.9\%$ unexplained