Finalization
Make changes to your graph and charts using the options highlighted below
Rename Sheet 2 by double clicking and writing your own chart title
Editing options such as color, size, label etc in marks
Make changes to your graph and charts using the options highlighted below
Rename Sheet 2 by double clicking and writing your own chart title
Editing options such as color, size, label etc in marks
Don't forget the captions:
After this, you can just take a screen shot of your graph and use it in your PowerPoint.
If you click on save on top, you will need to login to your Tableau profile and it will be saved on your profile - this will be publicly available to everyone (so don't do it with sensitive data)
There are many options in Tableau public, and I would encourage you to try them out yourself.
For example, I have uploaded two simple graphs on my public profile - check them out.