you use a line of best fit for a set of data to make a prediction about an unknown value. The correlation for your data set is -0.015. How confident can you be that your predicted value will be reasonably close to the actual value?

Question

mathmale · Answer

I think you mean "correlation coefficient," not just "correlation."  A correlation coefficient at or close to either 1 or -1 shows a very strong correlation, whereas one near zero, whether positive or negative, indicates a very weak correlation.  Please look up ":correlation" and "correlation coefficient" for more information.  Now, can you answer the question about "predicted value very close to the actual value?"