Use the MeetingPulse add-in
The MeetingPulse add-in allows you to select polls to show through your PowerPoint presentation.
http://help.meet.ps/faq/powerpoint-add-in-by-meetingpulse
Or use multiple windows.
If you're using an older version of PowerPoint or you need your IT department to install the add-in for you, sometimes easiest to simply have MeetingPulse open in a browser while you have your presentation open in PowerPoint. Since you are probably used to working in the browser, there will be fewer chances for the software to behave in an unexpected way. This also allows you to use keyboard controls for switching between Polls and Questions from the audience. Plus, you can use this method with presentation tools that aren't PowerPoint.
There are 2 ways to do this, and they can be used together.
Use ALT-Tab to switch between browser and window You can also use the keyboard stroke ALT-TAB to switch between windows. Here you'll want to have the broadcast view open in a browser already. Instead of clicking on a link in the presentation, you have the browser open already. At the appropriate time, you can use ALT-TAB to switch from your presentation to the browser.
Include links to MeetingPulse in your slideshow You usually will want to pick one of the broadcast views for showing your audience. When you're setting up your presentation, go into the open meeting to grab the Broadcast View links. During the meeting, when you're done with that screen, you can close the browser to get back to your presentation. (You can also use ALT-TAB.) Test it out beforehand so you're comfortable with how it works.
Referencing a specific poll
Often, you'll want to look at the results of a particular poll during your presentation. You can do this by including the poll ID in the URL you open. In order to get the poll ID, you need to start the poll (although you can then immediately stop it.)
Start the poll
Click on Launch Polls Broadcast View
Use the arrow keys to move between polls until you get to the one you want.
Copy the URL on that screen; it includes the poll ID.
Once you have that URL, you can put it into your presentation as a link or put it in its own browser window. You can also grab the URL of specific questions in a similar way.
Note: The ID changes when you reset the meeting, so make sure you're done with the testing before you reference specific polls or questions.