Fortunately, Microsoft allows you to use object linking and embedding techniques also known as OLE to link the data from Excel spreadsheet to PowerPoint slides which would automatically update ...

if you have access to the source file, you can link a table or graph in Excel to your PowerPoint slide. If the data in the worksheet is changed, it is automatically updated.

Select "Use Destination Theme & Link Data" from the drop-down list. Click and select the chart in the PowerPoint slide. PowerPoint displays the green "Chart Tools" tab at the top of the program ...