Can't erase small black dots

[Scottmorton]

Using Excel 2011 for Mac. Searched the internet, and can't see to find a way to erase these points. They appear to be graphics. I can pull them out to form lines, but when I try to drag them from the cell, they duplicate and remain in the original cell. I've tried clear all, and delete as well. Can't seem to get rid of them. Any suggestions would be appreciated.