How to display charts results with this plugin

The best way would probably be to use another plugin to display the chart. A quick look through the WordPress plugin repository yields a couple of possible candidates like this one.

You may also want to look at this article on my web site. A while back someone figured out that the Google Forms plugin could also display a Google Sheet. This wasn’t by design but it works. I have never tried it but it might work for a chart as well. My guess is it won’t work but you never know!