# Arithmetic/The Number Line

The number line is a one-dimensional graph to show the relative positions of numbers. As the line goes left, the numbers have less value; as the line goes right, the numbers have more value. The line continues *infinitely* (without end) in *both directions*.

The number line can be made in different intervals, that is, how many numbers the graph goes up and down by. The top image shows a number line going in intervals of one, while the bottom line graph goes in intervals of ten.

## Absolute Value[edit]

As you can see, the positive and negative numbers are of equal distance from the number zero. The distance of a number from zero is called the *absolute value*. The absolute value of a number is always positive or zero. This may also be referred to as the magnitude of the number. It is represented by two lines on the left and right of a number. When solving problems with absolute values, always solve the absolute number first. For example: