U3S5- Interval Notation Practice

Write the following in interval notation.

x < 8

• (8, -∞)

• (-∞, 8]

• (-∞, 8)

Can you use the symbols [ or ]
with infinity?

• Yes
• No

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

Write the following in interval notation.

x ≥ 100

• (0, 100]  

• (∞, 100]
• [100, ∞)

Write the inequality in interval notation. x > -1

• (-∞, -1)
• (-1, ∞]
• (-∞, -1]
• (-1, ∞) 

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

• (-5, ∞)

Write the following solution in interval notation:

x ≥ -3

• [ -3, ∞ )

• ( -3, ∞ )

• ( -∞ , -3 )

• ( -∞ , -3]