In this Excel tutorial lesson, you will learn how to use trendlines in Excel.
What are Trendlines
Trendlines are useful when you present data that is changing over time. The trend line on the chart is also used to predict the distribution of the data in the future or in the past. Forecasting is used in statistics and econometrics, where it is called regression.
Trendlines in Excel can be added only to uncumulative and two-dimensional charts. Types of graphs, which can be used to: area, column, line, stock, bar, scatter, and bubble. Trend lines can not be added to the chart: three-dimensional, stacked, radar, pie, surface, and ring.
As an example, I created a simple line chart.
Adding a trend line
To add a trend line, first you need to click on the chart. On the ribbon, there is a new Chart Tools menu. In the Layout tab, you’ll see the Trendline button. You can insert four different types of trend lines.
- Linear Trendline,
- Exponential Trendline,
- Linear Forecast Trendline,
- Two Period Moving Average.
Linear Trendline for this sample line chart will be like in the picture below.
In this way, you can insert a very simple trendline. You get more opportunities after selecting the More Trendline Options button.
Then the Format Trendline dialog box appears.
This dialog box gives you a lot of options for working with trendlines. For example, let’s see how it will look in the next 10 Forward Forecast periods for your sample trendline.
It’s just a very simple example, but I’m sure you know how to add a trend line and how to use trendline in Excel.