Inequalities and Graphing Inequalities

When writing a solution in interval notation, what do i use for:

> or <

• [ ]

• ( )

Write the following solution in interval notation:

x ≥ 6

• ( -∾ , 6]

• ( -∾ , 6 )

• ( 6, ∾ )

• [ 6, ∾ )

Write the following solution in interval notation:

z < 20

• ( -∞ , -20)

• ( 20,∞)

• ( -∞ , 20)

• ( -∞ , 20]

Write the following solution in interval notation:

x ≥ -3

• [ -3, ∞ )

• ( -3, ∞ )

• ( -∞ , -3 )

• ( -∞ , -3]

When you graph an inequality, you used a closed dot when you use which symbols?

• ≤, ≥ 

• <, >

What inequality is graphed? 

• x > 2 and x ≤ -3

• x > 2 and x < -3

• x > 2 or x ≤ -3

• x > 2 or x < -3

Less than:

• ≥

• ≤

• <

• >

Less than or equal to:

• ≤

• <

• >

• ≥

Greater than or equal to:

• <

• ≤

• ≥

• >

Greater than

• <

• >

• ≥

• ≤