Question

how is the coefficient of determination found?

by squaring the correlation coefficient and then subtracting from one.
by squaring the correlation coefficient.
by squaring the explained variation.
by squaring the explained variation and then subtracting from one.

Explanation:

The coefficient of determination ($R^2$) is calculated by squaring the correlation coefficient ($r$). The formula is $R^2 = r^2$. The other options are incorrect: subtracting from one relates to the coefficient of non - determination or residual variation, and squaring explained variation is not the correct method for finding $R^2$.

Answer:

B. By squaring the correlation coefficient.