Type an inequality to shade its solution region, and add more to see where they overlap. Free, no sign-up.
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The boundary is what you get if you replace the inequality sign with an equals sign. The shaded side is the set of points that make the inequality true. To check which side is right, test a point: for y > −x + 1, the origin gives 0 > 1, which is false, so the origin is not in the region.
A dashed boundary means strict: with < or >, points on the line itself are not solutions. A solid boundary means ≤ or ≥, where they are.
A system has as its solution the region where all the conditions hold at once, which on the graph is where all the shading overlaps. If the regions never overlap, the system has no solution. That is often easier to see in a graph than to work out algebraically, so it is a good way to check your answer.
Yes. It is free, with no account and no limit, and it runs in your browser.
Yes. Rows can hold functions, inequalities and points, all on the same graph.
Yes. Add one row for each inequality, and look for where the shaded regions overlap.