An inequality is a statement that two expressions are not equal.
|x is at least 3||x ≥ 3|
|y is at most 9||y <= 9|
|z is between 2 and 4||2 < z < 4|
|x is less than 3||X < 3|
|y is more than 9||Y > 9|
You can solve inequalities in the same way you can solve equations, by following these rules:
Graphing Inequalities on Number Lines.
The graph of a linear inequality in one variable is a number line. When we graph an inequality on a number line we use open and closed circles to represent the number. The open circle means the number is not included in the solution
X>5 means that whatever value x has, it must be greater than 5. The open dot shows that 5 is not a solution. Numbers greater than 5 are to the right of 5 on the number line.
The closed circle means the number is included in the solution. X ≥ 5 means that whatever value x has, it must be greater than or equal to 5
Numbers less than 5 are to the left of 5 on the number line. X<5 means x can be any value less than 5
Reversal property of inequality
If a < b then b > a