Why do you need a macro to do this.
Copy a range of cells in Excel.
In PP with a new Title-only slide, select 'Paste Special' and choose 'Microsoft Office Excel Worksheet Object' from the list. Select Paste (or Paste Link if you want the cells to continue to change if the source cells in the Excel workbook change), and click OK.
You now have an embedded Excel range of cells which can be edited like any Excel range.