Understanding Intervals

What type of interval includes both of its endpoints?

• Left-open interval

• Closed interval

• Open interval

• Right-open interval

In interval notation, how are excluded endpoints represented?

• Square brackets

• Curly braces

• Parentheses

• Angle brackets

What is another name for bounded intervals?

• Finite intervals

• Degenerate intervals

• Infinite intervals

• Unbounded intervals

In a closed interval, what is the smallest number called?

• Minimum

• Median

• Average

• Maximum

Why do open intervals lack a maximum element?

• Because they are finite

• Because they include all real numbers

• Because they are bounded

• Because they do not include their endpoints

What symbol is used in interval notation to indicate an interval is unbounded?

• Square bracket

• Infinity symbol

• Negative number

• Zero

How is a right-unbounded interval represented in interval notation?

• With a zero

• With a negative infinity symbol

• With a positive infinity symbol

• With a square bracket

What does it mean if an interval is unbounded on both ends?

• It includes only positive numbers

• It includes the entire number line

• It includes no points

• It includes only one point

What are proper intervals?

• Intervals that include only one point

• Intervals that are unbounded

• Intervals that include more than one point

• Intervals that include no points

What will be explored in the next lecture?

• Open intervals

• Degenerate intervals

• Unbounded intervals

• Bounded intervals