A standard notation for the
derivative, created by
Gottfried Wilhelm von Leibniz(1646-1716) who, along with
Isaac Newton, was one of the founders of
calculus.
The Leibniz notation for the derivative is dy/dx. This is read aloud as "the derivative with respect to x". Leibniz notation is often used in fields of study such as physics and economics, more often than Dx notation.