You can use the equation of the trendline to make predictions about future data points. Excel will automatically calculate the trendline and add it to your graph. To add a linear trendline to your data, select the 'Linear' option from the trendline menu. They are best used with linear data, which is data that increases or decreases at a constant rate. Linear trendlines are the simplest type of trendline. Select the type of trendline you want to use. A menu will appear with different types of trendlines you can add to your data. Then, click the 'Insert' tab on the ribbon and click the 'Trendline' button. To add a trendline to your Excel graph, first select the data you want to use to create the trendline. In this article, well show you how to add a trendline to your Excel graph and interpret the results.

Trendlines are best used with linear data, but you can also add them to logarithmic, polynomial, and exponential data. Adding a trendline to your Excel graph can help you see patterns in your data and make predictions about future data points.