When graphing multiple inequations, FX Graph can graph each as a half plane, or combine the inequations and shade ONLY the feasible region.
For example, if we graph 2x + y <= 8 and x + 2y <= 10
Half Planes
Shading half planes
When shading half planes, FX Graph shades the region which satisfies each equation INDIVIDUALLY. In the above example, the region which satisfies both inequations has been shaded twice. FX Graph uses each function's color for its shading.
If you prefer, you can set FX Graph to shade the half plane that does NOT satisfy the inequation. This option is available by choosing Preferences from the Tools menu.
Only Feasible Region
Shading ONLY feasible region
In the second graph, FX Graph has calculated the region which satisfies BOTH inequations and has shaded just that region. This is often more clear. The area is shaded using the color selected in the Quick Entry screen.
