Graphing Inequalities Calculator

An inequality with x and y in it does not have a single answer, it has a region of the plane. Enter the coefficients of ax + by against c, pick the relation and it draws the boundary line, shades the side that satisfies the inequality, and checks a test point so you can see why that side. The second tab takes two inequalities and shades only where they overlap, reporting the corner where the boundaries cross and the corners of the visible region. The boundary comes out dashed for a strict inequality and solid when equality is included, and nothing here parses typed algebra or handles a curved boundary.

Calculator Type

Shades the half-plane where the inequality holds, with the boundary drawn solid or dashed as it should be.

a, the x coefficient

b, the y coefficient

ax + by

c, the constant on the right

Smallest x On the Plot

Largest x On the Plot

Smallest y On the Plot

Largest y On the Plot

Widget

The overlap of two half-planes, with the corner where the boundaries meet.

First: a, the x coefficient

First: b, the y coefficient

First: ax + by

First: c

Second: a, the x coefficient

Second: b, the y coefficient

Second: ax + by

Second: c

Smallest x On the Plot

Largest x On the Plot

Smallest y On the Plot

Largest y On the Plot

Widget