A Swiss mathematician, Leonhard Euler, is who came up with graphs. He was born in 1707 and died in 1783. He discovered graphs while working on Kaliningrad bridge in Russia.
http://www.ask.com/webanswers/Science/Mathematics...

Rene descartes invented bar graphs you can find more about him in the book.A flyon the celieng.
http://wiki.answers.com/Q/Who_invented_bar_graphs

Ren'ee Descartes, a French mathematician came up with the Cartesian Coordinate System. Thanks
http://www.chacha.com/question/whoinventedgraphi...

Who invented Nintendo? Nintendo is a household word made famous for its range of gaming equipment, but the origins of Nintendo were humble compared to the multibillion dollar company
http://www.life123.com/technology/homeelectronics...
