Inequalities (OCR GCSE Maths): Flashcards

A range of possible values for a variable

Less than

Less than or equal to

Greater than

Greater than or equal to

When inequality includes equal to ($≤$ or $≥$)

When inequality doesn't include equal to ($<$ or $>$)

Flip the inequality sign

For $≤$ or $≥$ inequalities

For $<$ or $>$ inequalities

Choose a test point and substitute to check which side satisfies the inequality

Unwrap the unknown variable in the middle

Simplify, sketch the graph, use graph to find values