Find critical points, solutions to equations, and intersections between Cartesian functions.
Graphmatica is a powerful, easy-to-use, equation plotter with numerical and calculus features. Graph Cartesian functions, relations, and inequalities, plus polar, parametric, and ordinary differential equations. Numerically solve and graphically display tangent lines and integrals. In summary, a great tool for students and teachers of anything from high-school algebra through college calculus.