Yes, it is possible to link the Power Fit result back to the spreadsheet for further data analysis. Here are the steps to do so:

1. Right-click on the chart and select "Select Data" from the drop-down menu.
2. In the "Select Data Source" dialog box, click on the "Hidden and Empty Cells" button.
3. In the "Hidden and Empty Cell Settings" dialog box, select the "Connect data points with line" option and click OK.
4. Close the "Select Data Source" dialog box.
5. Click on the chart to select it.
6. Click on the "Design" tab in the Excel ribbon.
7. Click on the "Select Data" button in the "Data" group.
8. In the "Select Data Source" dialog box, click on the "Edit" button under "Horizontal (Category) Axis Labels".
9. In the "Axis Labels" dialog box, select the range of cells that contains the x-axis values for the chart and click OK.
10. Close the "Axis Labels" dialog box.
11. In the "Select Data Source" dialog box, click on the "Edit" button under "Legend Entries (Series)".
12. In the "Edit Series" dialog box, select the range of cells that contains the y-axis values for the chart and click OK.
13. Close the "Edit Series" dialog box.
14. Close the "Select Data Source" dialog box.

Now, the chart is linked to the spreadsheet and any changes made to the data in the spreadsheet will be reflected in the chart. You can use these values for further data analysis by referencing them in other cells or formulas in the spreadsheet.