Find Out How to Determine Accuracy of Line of Best Fit

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To determine the accuracy of a line of best fit, the least squares method is recommended. This statistical technique minimizes the sum of the squares of the residuals, which are the differences between observed and predicted values. Evaluating the R-squared value can also provide insight into how well the line fits the data. Additionally, examining residual plots can help identify any patterns that indicate a poor fit. Understanding these methods will enhance the ability to assess the accuracy of the line of best fit.
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Hi everybody

I was set a homework but I don't know how to do it because our teacher didn't taught us something like that and I have looked in a lot of books I still don't know what to do.
The question is how to determine the accuracy of a line of best fit.
can somebody help me with that please

Thank you :)
 
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Use the least squares method.
 
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