Two-variable inequality region
Linear inequalities · Stage 3
Recognize the pattern
Test a point by substituting both coordinates into the inequality.
Useful ruleAx+By≤C
Build on: ALG-06
Try it before reading the solution
Does (2, 1) satisfy y ≤ 2x + 1?
This teaching example is original and is not an official SAT question.
Reasoning
With x = 2, the right side is 5; y = 1 is at most 5.
AnswerYes
03 · Next step
See membership →Ready for adaptive practice
Practice questions remain in English, as on the SAT.