Who is the french mathematician that invented Cartesian coordinate plane?

Answer 1

Rene Descartes, the surname means ( some charts or some maps) Descartes theorized than any equation can be expressed in graphical form, form follows family names! Descartes and the Cartesian idea became associated with the Cartesian diver, a toy deep-see diver that rises and falls owing to buoyancy and openings in the diver figure. It is probable this came along long after the death of M Descartes, but was bestowed in an honorary fashion- as were many of the (Inventions) of Leonardo Da Vinc i and closer to home, Franklin.