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What is a circle graph primarily used for?

  1. To show trends over time

  2. To compare quantities

  3. To illustrate parts of a whole

  4. To display data changes

The correct answer is: To illustrate parts of a whole

A circle graph, also known as a pie chart, is primarily used to illustrate parts of a whole. This type of graph visually represents the proportion of different categories relative to a total, allowing viewers to easily see how each segment contributes to the entirety. This makes it an effective tool for demonstrating how various components compare to each other within the context of a whole dataset. It is particularly useful when you want to highlight relative percentages, making it clear how portions relate to the total amount in visual form.