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You can link data from a saved Excel spreadsheet or copy cells from an Excel spreadsheet into your Microsoft PowerPoint 2010 presentation.
If you have PowerPoint slides that report regularly updated financial or numeric data that comes from an Excel spreadsheet, you can save a lot of time by linking the data instead of retyping it. This technique also allows you to secure the data from others changing it and prevents accidental transposition errors.
In this video you can find solutions:
How to link data from excel to powerpoint and dynamic data updates
link data from excel to powerpoint
excel to powerpoint