Mathematics for IGCSE & O level - Inequalities (Section 1 - No. 16)
What are some of the key points to remember when representing regions satisfying more than one inequality?
When plotting a line like 3x + 4y = 12, choose x=0 to give 4y=12
Include an equals sign if the line is solid
The part of the grid that is not shaded is the required region.
When you are solving multiple inequality problems you often have to shade the region that does not satisfy your inequality.
Forklaring
Key Points to remember for representing regions satisfying more than one inequality.