Final answer:
The representative fraction of a nautical chart is a ratio that shows the scale of the chart. In this case, the scale is given as 1:80,000, which means that 1 unit on the chart represents 80,000 units in real life.
Step-by-step explanation:
The representative fraction of a nautical chart is a ratio that shows the scale of the chart. In this case, the scale is given as 1:80,000, which means that 1 unit on the chart represents 80,000 units in real life. This ratio is often used in cartography to accurately depict distances and measurements on a chart.
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