Set Notation Practice

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

• ≤, ≥ 
• <, >
• ≤, <
• ≥, >

Would you use a closed or open circle to graph x < 3?

• Closed
• Open

Can you use the symbols [ or ]
with infinity?

• Yes
• No

What interval notation does the number line graph represent?

• [∞, -5)

• (∞, -5)

• [-5, ∞)

• (-5, ∞)

Write the interval notation for the graph?

• [-3, 2)

• -3<x<2

• (-∞, -3] U (2, ∞)

• x > 2 or x < -3

What inequality is graphed?

• 2 < x < 4

• 2 ≤ x ≤ 4

• x > 2 or x < 4

• x ≥ 2 or x ≤ 4

Write the following solution in set builder notation:

x ≥ -2

• { x | x ≥ 2 }

• { x | x ≥ -2 }

• { x ≥ -2 }

• { x | x ≤ -2 }

Write the following solution in set builder notation:

y > 10

• { y > 10 }

• { y | y > 10 }

• { y | y < 10 }

• ( -0, 10 )

Write the following solution in interval notation:

x ≥ -3

• [ -3, ∞ )

• ( -3, ∞ )

• ( -∞ , -3 )

• ( -∞ , -3]

Write the following solution in interval notation:

z < 20

• [ -∞ , 20 )

• ( 20,∞)

• ( -∞ , 20)

• ( -∞ , 20]