Powerpoint question

[Angrist]

Interviewed 17 people for a total of 38 experiences (some had multiple emotions, in total 50).

I asked:
Was it a positive or negative emotion? On a scale of 1 (very negative) to 7 (very positive)?
Was it inactive or inactive? On a scale of 1 (very inactive) to 7 (very active)?

Of course I asked way way more stuff, but I only want to put this stuff in a graph.

The negative values is only because I think it looks cool. They're negative emotions in nature.

So if I'm going for the second graph, how do I make that in Powerpoint/OpenOffice?
Thanks btw.