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.
â¢ An equation is two or more expressions with an equality condition and the equation is true for one or several values of the variables. An equation makes complete sense as long as the equality condition is not violated.