# Linear equation( Point–slope form)

## Description

A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable. The point-slope form expresses the fact that the difference in the y coordinate between two points on a line (that is, y − y1) is proportional to the difference in the x coordinate (that is, x − x1). The proportionality constant is m (the slope of the line).

Related formulas## Variables

y | Y-coordinate or ordinate of the unknown point (dimensionless) |

y_{1} | Y-coordinate or ordinate of the known point (dimensionless) |

m | The slope of the line (dimensionless) |

x | X-coordinate or abscissa of the unknown point (dimensionless) |

x_{1} | X-coordinate or abscissa of the known point (dimensionless) |