You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data set is 1. How confident can you be that your predicted value will be reasonably close to the actual value?
2 answers
You can be very confident that your predicted value will be reasonably close to the actual value since the correlation coefficient is 1. This indicates that the data points are perfectly correlated, meaning that the line of best fit is an accurate representation of the data.
The answer is
I can be certain that my predicted value will match the actual value exactly.
I can be certain that my predicted value will match the actual value exactly.