How many principles of analytical graphs exist?

There are 3 principles of analytical graphs:

1. Accuracy: The graph should be accurate in representing the data. This means that the scale should be appropriate, the axes should be labeled correctly, and the data points should be plotted accurately.
2. Clarity: The graph should be easy to read and understand. This means that the axes should be clearly labeled, the data points should be easy to see, and the graph should be well-organized.
3. Relevance: The graph should be relevant to the data that it is representing. This means that the graph should be clear about what it is showing and why it is important.

Option A is incorrect because there are 3 principles of analytical graphs, not 4.
Option B is incorrect because there are 3 principles of analytical graphs, not 6.
Option C is incorrect because there are 3 principles of analytical graphs, not 6.
Option D is correct because there are 3 principles of analytical graphs.