{{ item.displayTitle }}

No history yet!

Student

Teacher

{{ item.displayTitle }}

{{ item.subject.displayTitle }}

{{ searchError }}

{{ courseTrack.displayTitle }} {{ statistics.percent }}% Sign in to view progress

{{ printedBook.courseTrack.name }} {{ printedBook.name }} An interval can be used to represent a set of values that lies **between** two numbers. It can also represent a set of values that are **greater than** or **less than** a specific number. They are often represented by using inequalities. An interval on a number line, consisting of the real numbers, contains an infinite amount of numbers. In the interval $1≤x≤4$, all numbers between the x-values $1$ and $4$ are a part of the set. For example, $1$, $2.7$, $3.5$, $3.61$ and $4$. To visually represent an interval, a number line is often used. This is done by marking the end points of the interval and drawing **between** them.

An interval does not have to be limited between two ends. For example, the inequality $x≥0$ is a set of **all** positive real numbers larger than or equal to 0.