Interval Notation

Front

What does an open circle represent in interval notation?

Back

An open circle indicates that the endpoint is not included in the interval.

Front

What does a closed circle represent in interval notation?

Back

A closed circle indicates that the endpoint is included in the interval.

Front

Can you use the symbols [ or ] with infinity in interval notation?

Back

No, you cannot use [ or ] with infinity.

Front

How is the interval notation for x ≥ 100 expressed?

Back

[100, ∞)

Front

How is the interval notation for x < 8 expressed?

Back

(-∞, 8)

Front

What interval notation does the number line graph [-5, ∞) represent?

Back

It represents all numbers greater than or equal to -5.

Front

What is the interval notation for x > 3?

Back

(3, ∞)

Front

What is the interval notation for x ≤ -2?

Back

(-∞, -2]

Front

How do you express the interval for all real numbers in interval notation?

Back

(-∞, ∞)

Front

What does the notation (a, b) signify in interval notation?

Back

It signifies an open interval where a and b are not included.