1. Linear Inequalities

2. Ex:

3. 1. Graph inequality like a linear equation.
2. Line becomes boundary line.
­ if > (greater than) boundary line is dashed
because values are not
­ if < (less than) part of solution
boundary line is
­ if (greater than or equal to)
solid because values
­ if (less than or equal to) are part of solution

4. 3. Test a point on each side of the boundary line to determine
the solution area.
4. Shade in the region that represents the solution.

6. System of linear inequalities:
Two types of systems.
1. Intersection of the inequalities ( and )
and
2. Union of the inequalities ( or )
or

7. and

8. or

9. Exercise 27
Questions 1 ­ 11