Notes
equation of a shape

Equation of a Shape

The equation of a shape drawn on a set of axes is an equation that is satisfied by the points of the shape and no others.

Equation of a Straight Line

A straight line in the xyx{-}y-plane can be described by an equation of the form:

(1)ax+by=c a x + b y = c

If b0b \ne 0, this can be rearranged to the form:

(2)y=mx+c y = m x + c