Formatting a trendline is a statistical way to measure data. 4] Add a moving average line. ... This way, you can add a trendline to an Excel chart and add more depth in its information.

Microsoft Excel's Data Validation tool lets you add a drop-down list to a cell based on existing data in a column. However, how this works depends on whether the source data is part of a formatted ...

Open Microsoft Excel. Enter you data down column A. Enter "=AVERAGE(A:A)" in cell B1. This configuration looks for all data points in column A so when you add data to the column, it is included in ...