The number of questions that students answered incorrectly on the last quiz is shown in the dot plot below.

A number line going from 1 to 9. 3 dots are above 1. 1 dot is above 3. 2 dots are above 4. 4 dots are above 5. 2 dots are above 6. 1 dot is above 7. 3 dots are above 9.
Use the dot plot to complete the statements.

The dot plot shows that students answered 4 questions incorrectly on the quiz.

The most frequent number of questions answered incorrectly was .

The data distribution is