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Graph of an Equation or Inequality

The picture obtained by plotting all the points of an equation or inequality.

If there is only one variable, the graph is on a number line. If there are two variables, the graph is on the coordinate plane. If there are three variables, the graph is in three-dimensional coordinates. In general, for n variables, the graph is in n dimensions.

For example, the graph of the equation y = x + 1 given below is obtained by plotting all the points with a y-coordinate that is 1 larger than the x-coordinate.

 

 

See also

Function, relation, coordinates

 


  this page updated 21-feb-16
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes