WebGraphing.com
provides 24/7 online graphing and solving of functions, equations, systems
of equations, inequalities in one and two variables, and piecewise functions,
with varying levels of analysis appropriate for students of algebra, precalculus,
and calculus. Polynomial graphs of functions, equations, and systems
of equations up to degree three are free, as are any degree
polynomial multiplication and long polymial division. There is also
a forum for the different levels of students. Students find the web site
useful for checking their homework, doing projects, and homestudy, while
teachers find the web site useful for checking their own work and copying
the publication quality graphs for worksheets and tests.