Inequalities in Interval Notation

Write the following solution in interval notation:

x ≥ -3

• [ -3, ∞ )

• ( -3, ∞ )

• ( -∞ , -3 )

• ( -∞ , -3]

Write the following solution in interval notation:

• ( -∞ , 20 )

• ( 20,∞)

• ( -∞ , 20)

• ( -∞ , 20]

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

• (-5, ∞)

When writing a solution in interval notation, what brackets do i use for: > or <

• [ ]

• ( )

Solve the inequality. Put your answer in interval form:

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

• [-9, -4]

• (-9,-4]

• [-9, -4]

• (-9,-4)

- 5 x ≥ 30

• [-6, ∞)

• (-6, ∞)

• (-∞, -6)

• (-∞, -6]

Which scenario could be represented by the graph?

• The temperature is less than -1 degree.

• The temperature is more than -1 degree.

• The temperature is at most -1 degree.

• The temperature is at least -1 degree.

Solve the inequality.

x + 5 ≤ 13

• [8, ∞)

• [18, ∞)

• (-∞, 8]

• (-∞, 18]

Write the inequality in interval notation.

• (-2,5)

• (-∞,-2) or (5,∞)

• [-2,5]

• (-∞,-2] or [5,∞)