Yes you can!
From the My Studies page, click on the required study.
Click on the Results tab.
Select the Dashboard that hosts the graph you’d like to save.
On the actual graph you’d like to save click the ellipsis (…) and select Image.
This will give you the options to save the single graph as a PNG, JEPG or PDF.
Select the option you’d like and it will download the file to your Downloads folder.