Algebra › Section C · Graphs and functions › Topic C.4
Graphing linear inequalities
An equation in two variables draws a line; an inequality paints a whole region. One boundary line, one test point and one decision about solid or dashed turn the inequality into a picture of every solution at once.
In this topic
- From lines to regions
- Testing solutions
- The boundary line
- Solid or dashed
- The test point method
- Worked example: a strict inequality
- Worked example: a florist's budget
- Reading an inequality from a graph
- Common mistakes to avoid
- Key takeaways
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