Find the Value of the Linear Correlation Coefficient R $( \mathrm { y } )$

Multiple Choice

Find the value of the linear correlation coefficient r.
-Based on the data from six students, the regression equation relating number of hours of preparation (x) and test score $( \mathrm { y } )$ is $y = 67.3 + 1.07 x$ . The same data yield $r = 0.224$ and $\bar{y} = 75.2$ . What is the best predicted test score for a student who spent 2 hours preparing for the test?

A) 69.4
B) 78.1
C) 75.2
D) 59.7