A **number line** represents the value of a number as a distance from zero.

A number line can represent a fraction if the space between

two consecutive whole numbers is divided into equal parts.

The number line is divided into six equal parts between 0 and 1.

When a whole is divided into six equal parts, each part is $\frac{1}{6}$ of the whole.

There are four parts of the line between 0 and the dot.

So, the dot on the number line represents $\frac{4}{6}$.