When you insert a new chart in PowerPoint 2013, you might notice that an instance of the Excel sheet containing some dummy data for your chart pops up within PowerPoint — you then change the data within that instance of the Excel sheet to auto-update the chart on your slide. However, this Excel instance that stores your data has no separate existence — there’s no separate Excel sheet that contains your data. In fact, this Excel sheet is stored within your PowerPoint presentation itself.
Learn how to edit chart data in PowerPoint 2013 for Windows.

