![]() It operates under the following syntax: =TREND(known_data_y,, ) The TREND function is used to show forecasting potential future values, but you can also use it as a trendline Google Sheets to make lines of best fit in existing data. Using the TREND Function to Make a Trendline You can also add trendlines to each individual data set instead of all at once by selecting the series from the dropdown menu instead of Apply to all series. Make sure the drop-down list has Apply to all series selected.Navigate to Chart editor > Customize > Series.Say we wanted a trendline for both Product A and Product B. If your scatter plat has more than one series, you can add a trendline for each set of data. Adding Multiple Trendlines in Google Sheets Play around with the different options until you finally obtain a trend line that provides you with enough insight on your data. ![]() It is also a little tough to make proper sense of the distribution. These lines can help you understand the direction of the data, make forecasts and understand relationships between data elements.įor example, if you look at the scatter chart below, you can somewhat tell how the data points are distributed but it’s hard to tell if there’s an upward or downward trend. What is a Line of Best Fit, and Why Add a Trendline?Ī trend line, or a ‘ line of best fit’ is one that is superimposed on a chart to understand trends within the data.
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