Interval Notation

State the set of numbers shown on the number line in interval notation.

Write the following in interval notation.

x < 8

• (8, -∞)

• (-∞, 8]

• (-∞, 8)

Express the following in Interval Notation

-8 ≤ x < 8

• [-8, 8]

• [-8,8)

• (-8, 8]

• (-8, 8)

When graphing an inequality solution, what type of circle do I draw for the symbol:

or ≤ or ≥

• Closed Circle

• Open Cirlce

When graphing an inequality solution, what type of circle do I draw for the symbol:

> or <

• open circle

• closed circle

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

> or <

• [ ]

• ( )