Introduction to the Number Line

A detailed tutorial on the number line. Step by step tutorial including several examples of when and how use the number line for reference.

The number line is a basic concept in math that helps to visualize where all the numbers are. On a traditional number line, the number zero is placed in the middle, with numbers going up by one lining either side (the left side is negative, the right side is positive). The number line stretches to infinity in both directions. The number line is used when first learning math to assist with addition and subtraction. The number line is brought up again in algebra, to help with inequalities. Often inequalities are graphed on the number line, to show possible values of the variable given.

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