Question: You generate a scatter plot using Excel. You then have Excel plot the trend line and report the equation and ther 2 r2 value. The

You generate a scatter plot using Excel. You then have Excel plot the trend line and report the equation and ther

2

r2

value. The regression equation is reported as

y

=

77.35

x

+

40.27

y=-77.35x+40.27

and ther

2

=

0.81

r2=0.81

.

What is the correlation coefficient for this data set?

r=

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