![]() However, unless you have a very old version of Excel, where the LINEST function did not work properly, it is usually simpler to just use worksheet functions for that purpose.įor example, if this is a line graph where y is your range of y-values your trendline is a 4th order polynomial, and your x-axis is just serial numbers 1. ![]() There are different trendlines available, so it’s a good idea to choose the one that works best with the pattern of your data. This adds the default Linear trendline to the chart. ![]() ![]() You can use the trendline from a graph in an equation, but, in addition to translating it correctly, you need to also format the trendline to show a maximum number of decimals (e.g 15), else your results will not be congruent with the graph. Select the chart, click the Chart Elements button, and then click the Trendline checkbox. ![]()
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