Calculate and interpret the coefficient of determination

The coefficient indicates that 27% of the variation in practice points is explained by variation in practice time (min)

Keep the sign of r in the coefficient, so use 0.52; its sign gives the direction of the association

27% of the variation in practice time (min) is explained by variation in practice points

The value 0.52 is r rather than r², so it gives the percentage of variation explained in practice points