Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
Expressions versus Equations. A difference between expressions and equations is what each represents. An expression shows a math relationship. One key to an expression is that there is no solution. An expression does not have an answer. An expression, however, can be evaluated. To evaluate an expression, substitute values for the variables.
In simpler terms, the value of an equation is determined by the value the expressions are equated with, while the value of a function depends on the value of âXâ assigned. To make it clearer, students should understand that a function gives the value and defines the relationships between two or more variables.