Proof Without Words
Drage the points.[br]Drag the slider.[br]What does this prove?[br]How does this prove?
Proof Without Words
Based on [url]http://45.media.tumblr.com/9e608e03763922f7620fa7b21487f640/tumblr_nywxpgk6631uk13a5o1_500.gif[/url]
Information: Proof Without Words