• #### 1.  Write the following in interval notationx < 3 or x ≥ 5

• (3, -∞) or (∞, 5]
• [-∞, 3) or [5, ∞]
• (-∞, 3) or [5, ∞)
• (3, -∞] or [∞, 5]

• -7 ≤ x ≤ 15
• -7 < x ≤ 15
• -7 ≤ x < 15
• -7 < x < 15
• #### 3.  Look at the graph. Write the inequality in interval notation.

• (-2,5)
• (-∞,-2)⋃(5,∞)
• [-2,5]
• (-∞,-2]∪[5,∞)
• #### 4.  Write the following in interval notationx ≥ 100

• (0, 100]  (Real quick)
• (∞, 100]
• [100, ∞)
• (∞, 100)

• 3 ≤ x ≤ 5
• 3 < x ≤ 5
• 3 ≤ x < 5
• 3 < x < 5
• #### 6.  Look at the picture. Select the correct interval notation for the given number line.

• (-∞, -8) U (-4, ∞)
• (-∞, -8] U [-4, ∞)
• (-8, -4)
• [-8, -4]

• Graph 1
• Graph 2
• Graph 3
• Graph 4
• #### 8.  (-2,12) can be written in inequality notation as:

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

• Graph 1
• Graph 2
• Graph 3
• Graph 4

• [-9, -4]
• (-9,-4]
• [-9, -4]
• (-9,-4)
• #### 11.  Write the following in interval notationx > 6 and x ≤ 10

• (-∞, 6) and (10, ∞)
• [6, 10)
• (-∞, 6] and [10, ∞)
• (6, 10]

• (-7, 8)
• [-7, 8)
• [-7, 8]
• (-7, 8]

• [-9, -8.5]
• [-9, -8.5)
• (-9, -8.5]
• (-9, -8.5)
• #### 14.  Express the following interval in Set notation:[14.2, 19.6)

• 14.2 ≤ x ≤ 19.6
• 14.2 < x ≤ 19.6
• 14.2 ≤ x < 19.6
• 14.2 < x < 19.6

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

• open
• closed
• #### 17.  Express the following interval in Set notation:(-63, -62)

• -63 ≤ x ≤ -62
• -63 < x ≤ -62
• -63 ≤ x < -62
• -63 < x < -62

• (8, ∞)
• (8, -∞)
• (-∞, 8)
• [-∞, 8]
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