I've plotted a graph that corresponds to a set of data points from a scientific experiment. Is there any way to draw a best-fit line through these points?
select the data series, right click, select 'add trendline', select a type, select the options tab, select 'Display R-quared value on the chart'. The curve of best fit (trendline) to your data is the one with an R-squared value closest to 1 - change to trendline type to find out which this is.
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