![]() ![]() 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. This is useful for a visual display, but you can also calculate the formula of the line using Excel’s SLOPE and INTERCEPT functions. The equation that is displayed for a trendline on an XY Scatter chart in Microsoft Excel is incorrect. 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. Excel has features that allow you to plot the data pairs graphically in a chart, add a trendline (calibration curve), and display the calibration curve’s equation on the chart.
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