# Curves

### Frequency Curve

Cartesian equation:
$y = √(2π) \exp(-x^{2}/2)$

### Description

This curve, the normal curve of error, originated with de Moivre in 1733. It was also studied with Laplace and Gauss.

The name frequency curve also applies to a great variety of other curves.

### Associated Curves

Definitions of the Associated curves