Copy and Paste - from Excel

Uses (Edit > Copy) and (Edit > Paste).

Selecting the Chart Area

Highlight the chart in Excel (with black handles)

Select (Edit > Copy) or alternatively use the shortcut key (Ctrl + C)

Selecting the Shape Object

You can hold down either the Ctrl or the Shift key.
Highlight the chart in Excel (with white handles)

Select (Edit > Copy) or alternatively use the shortcut key (Ctrl + C)

Pasting into PowerPoint

Select the slide you want to insert the chart on and select (Edit > Paste) or alternatively press (Ctrl + "V").

Your chart has actually been embedded in the slide.
You can double click the chart to make changes.

The chart is not linked to the original file.

Important

Resizing the chart once in PowerPoint will distort all the text.
If your chart is too large for the page, then it will be automatically resized to fit on the slide.