**2.3.1 Position of a point relative to the graph of**

*y*=*ax*+*b***1.**When

**, the point is on the line.**

*y*=*ax*+*b***2.**When

**, the point is below the line.**

*y*<*ax*+*b***3.**When

**, the point is above the line.**

*y*>*ax*+*b***2.3.2 Identifying the region satisfying the respective inequalities.**

**1.**A dashed line ‘----’ is used when points on the line are not included in the region representing the inequality, such as

*y*>

*ax*+

*b*or

*y <*

*a*or

*x*>

*a.*

**2.**A solid line ‘___’ is used when points on the line are not included in the region representing the inequality, such as

*y*≥

*ax*+

*b*or

*y ≤*

*a*or

*x*≥

*a.*

**3.**The diagrams below show the regions that satisfy the respective inequalities.