Although you can work with Slicers within PowerPoint by inserting an Excel Workbook object, they will only work in 'design' mode and will not work during a presentation.
You can see how to insert and work with Excel Workbook objects in the video lesson: Expert Skills Lesson 8-7 Embed an Excel worksheet object into a Word document.
If you want to work with slicers during a presentation, I would suggest either switching between Excel and PowerPoint while you are presenting or using static screenshots of your chart on several slides to simulate using the slicer.
You can also find the video lesson explaining slicers in: Expert Skills Lesson 5-8 Filter a pivot table visually using slicers.
I hope this helps, but please feel free to reply if you need any more assistance.
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