The graph is depicting the relation between employees and the salaries.
These is a need to explain which statement is true.
Here, the correct answer is C. The intervals are not of same width.
As we can see, the intervals are starting from 0-19 showing a difference of 19, till the point 40-49 they are correct, but after 49, the next interval is 50 - 99, showing a difference of 49.
<u>Thus, the intervals are not of same width. </u>