How can chart scales be expressed?

Chart scales can be expressed in various formats to provide flexibility in how information is conveyed. The correct answer highlights that scales can be represented in words, as a fraction, or as a graduated line.

When expressed in words, the scale can specify the relationship between distance on the chart and distance on the ground, which helps in understanding real-world distances. For example, a scale might state that "one inch equals one mile."

As a fraction, the scale provides a mathematical representation of the relationship, such as 1:100,000, indicating that one unit on the chart corresponds to 100,000 of the same units on the ground. This is particularly useful for precise calculations of distances based on the scale.

A graduated line, or graphic scale, offers a visual representation, allowing the user to quickly estimate distances by comparing physical measurements on the chart to the representations on the line. This method is practical since it doesn't require conversions or calculations.

The diversity in expressing chart scales makes them versatile tools for navigation, ensuring users can choose the format that best suits their needs.