Interval Notation Review

Front

Can you use the symbols '[' or ']' with infinity?

Back

No

Front

Which number line corresponds to the interval [-2, 5]?

Back

Graph 4

Front

What inequality is represented by the graph?

Back

2 ≤ x ≤ 4

Front

Write the inequality in interval notation for x > -1.

Back

(-1, ∞)

Front

When graphing b < 6, would you use an open or closed circle?

Back

Open circle

Front

What does the interval notation (a, b) represent?

Back

All numbers between a and b, not including a and b.

Front

What does the interval notation [a, b] represent?

Back

All numbers between a and b, including a and b.

Front

How is the interval notation (-∞, a) interpreted?

Back

All numbers less than a.

Front

How is the interval notation (a, ∞) interpreted?

Back

All numbers greater than a.

Front

What is the difference between open and closed intervals?

Back

Open intervals do not include endpoints; closed intervals do.