Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
The main difference between an equation and a function is the fact that an equation usually deals with a single input, whereas, a function can have numerous inputs. In mathematics, an equation is used to denote the equality between two expressions.
An equation is a statement in which two algebraic expressions are equal. Linear Equations of one variable is the equation which involves only one variable. General form of a linear equation of one variable is ax + b = 0, where a i s not equal to 0.