Find the length of BC. Round your answer to the nearest tenth.

6.8cm

Step-by-step explanation:

I dont have an explanation

If you observe the 4 graphical representations you will see that except stem and leaf plot, the rest 3 represent the same information. 

As the time is increasing, the frequency of students who listen to music is decreasing. The frequency is maximum for the first group 0 - 1 and least for the last group 6 - 7.

The ranges shown in both Frequency Table and Histogram are the same. 

So, the following options are correct:
B) One of the displays does not show the same information as the others.
C) The first three displays show that as time increases, frequency decreases.