Interval Notation - Do Now

Write the following in interval notation.

x < 8

• (8, -∞)

• (-∞, 8]

• (-∞, 8)

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

Look at the Graph. Write the inequality in interval notation.

• [-4, -1)

• (-4, -1)

• (-4, -1]

• [-4, -1]

Express the following in Interval Notation

-9 < x ≤ -4

• [-9, -4]

• (-9,-4]

• [-9, -4]

• (-9,-4)

Express the following in Interval Notation

-8 ≤ x < 8

• [-8, 8]

• [-8,8)

• (-8, 8]

• (-8, 8)

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

• (-5, ∞)

Express the following in Interval Notation
 -9 < x ≤ -4

• [-9, -4]
• (-9,-4]
• [-9, -4]
• (-9,-4)

(-2,12) can be written in inequality notation as:

• -2 < x > 12
• -2 > x > 12
• -2 < x <12
• None of these

Which of the following numbers is not in the interval (3, 9]?

• 3

• 3.14

• 7

• 9