其它
\textbf{The height and age of each child in a random sample of children was recorded. The value of the correlation coefficient between height and age for the children in the sample was 0.8. Based on the least-squares regression line created from the data to predict the height of a child based on age, which of the following is a correct statement?} 
Overseas Competition->Knowledge Point->Calculation Modules
$$R^{2} = r^{2} = 0.8^{2} = 0.64$$ 