Linear trendlines are particularly useful when analyzing time-series data. In other words, if there is a trend in your data that can be represented by a straight line, then a linear trendline can be used to model that trend. A linear trendline is based on the assumption that there is a linear relationship between the independent and dependent variables in your data set. Why Linear Trendlines are Important in Data Analysisīefore we dive into the technical details of adding a linear trendline in Excel, let's take a moment to understand why it's important. Best Practices for Data Visualization with Linear Trendlines in Excel.
