Creating a trendline in Power BI involves using the built-in analytics tools. Here’s a step-by-step guide:

1. Open Power BI and Load Your Data

• Open Power BI Desktop.
• Load your data by clicking on Get Data and choosing your data source.

2. Create a Visualization

• Select the type of visualization you want to use (e.g., Line chart, Scatter chart).
• Drag and drop the relevant fields into the visualization to create your basic chart.

3. Add a Trendline

• Select the chart you created.
• Go to the Analytics pane. You can find this pane next to the Visualizations and Fields panes.
• In the Analytics pane, look for the Trend line option.

4. Configure the Trendline

• Click on the + Add button under the Trend line section.
• Configure the properties of the trendline, such as its name, color, and style.

Example: Adding a Trendline to a Line Chart

1. Create a Line Chart:
   • In the Visualizations pane, select the Line chart icon.
   • Drag a Date field to the Axis area.
   • Drag a numerical field (e.g., Sales) to the Values area.
2. Add a Trendline:
   • With the Line chart selected, go to the Analytics pane.
   • Expand the Trend line section.
   • Click on + Add to add a trendline.
   • Configure the trendline settings as needed.

5. Customize and Format

• You can further customize the trendline by adjusting its transparency, line style, and color.
• If you want to format the chart and trendline further, use the Format pane (paint roller icon).

Tips

• Ensure your data is properly formatted and cleaned for accurate trendline analysis.
• You can add multiple trendlines if your visualization supports it, which can be useful for comparing different trends.