Use a scatter plot to show changes in positive/negative emotions in texts?

I've never used scatter plots in my life, so I'm trying to wrap my head around it but I'm having problems visualising what I want to do and I don't know if it makes sense.

I used LIWC to analyse positive and negative emotions in a number of texts over the years, and I would like to show how the score changed. Would it make sense to use a scatter plot?

Besides, I also have different sources of text that …

emotions languagetechnology negative positive