Hi
It's a bad idea - the quality of chart will be low.
I think the best will be to create a dummy chart in PowerPoint, and copy the
data table in PowerPoint over with values from your excel chart source
table. I'm not sure about it, as I haven't used PP much, but I didn't found
in PP the way to create a chart with columnwise source table layout - so I
had to transpose the Excel tables before copying data.