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 Related Terms
Linear Equation:  An equation whose solution is a straight line.
 Variable: A letter or symbol used to represent a number. Unknown: A variable whose values are solutions of the equation that they are written in. Forming an Equation (Writing an Equation): Writing information presented in words as a mathematical sentence with an equality sign, operation symbols, numbers, and/or variables. Equivalent Equations: Equations that have the same solutions. Function: A rule of matching elements of two sets of numbers in which an input value from the first set has only one output value in the second set. Linear Function: An equation in which the graphs of the solutions form a (non-vertical) line. Linear Inequality: An inequality in two variables for which the graphs of the solutions form a half-plane on one side of a line and may or may not also form the line itself. Solution: A number (or ordered pair of numbers, or set of numbers) that produces a true statement when substituted for the variable(s) in an equation or inequality. Solving an Equation: Finding all the values of the variable(s) that make an equation true. Solving an Inequality: Finding all the values of the variable(s) that make the inequality true.