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Answer :

We can estimate it using the approximate value of the given points:

[tex]\begin{gathered} (1,2) \\ (3,4) \\ (5,7) \\ (6,5) \\ (8,7) \\ so: \\ R^2=0.761 \\ R\approx0.872 \end{gathered}[/tex]

Therefore, the correct answer is:

0.872

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