After taking AN300, C&A decides to use Excel to perform a linear regression forecast on the sale

After taking AN300, C&A decides to use Excel to perform a linear regression forecast on the sales of HDTV and obtains the following summary output of the regression analysis. What conclusions can be drawn?
Regression Statistics
Multiple R
0.87
R Square
0.76
Adjusted R Square
0.71
Standard Error
20.21
Observations
7
Linear regression is not a good forecast method because the correlation coefficient is 0.71.
Linear regression is a good forecast method because the correlation coefficient is 0.71.
Linear regression is not a good forecast method because the correlation coefficient is 0.87.
Linear regression is a good forecast method because the correlation coefficient is 0.87.
Linear regression is a good forecast method because the correlation coefficient is 0.76.