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 threedimensional
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 ycoordinate
that is
1 larger
than the
xcoordinate.
See
also
Function, relation, coordinates
