Region Grapher
Graph two inequalities at once: enter slopes, intercepts, and signs, add a test point, and see the feasible region and its vertex.
1 Region Grapher
Type both inequalities and a test point. The tool shades each half-plane, marks the vertex, and tests your point.
Input: y sign mx + b
Result
Press Graph the system.
Blue: inequality 1 · teal: inequality 2 · overlap: the feasible region · gold: vertex.
2 Reading the picture
The solution of a system is where the shadings overlap. The vertex — where the two boundary lines cross — is the corner of that region and satisfies both inequalities.