Because the question asks for the number of hostel rooms with 11 or less guests, we will add the amounts from the three categories that meet this requirement. Lets find the number of rooms for each:
0 - 3 guests: 3 rooms
4 - 7 guests: 5 rooms
8 - 11 guests: 8 rooms
Now, we will add 3, 5 and 8.
3 + 5 + 8 = 16
This means thirteen hostel rooms have 11 of fewer guests.
The x-axis of the graph isn't constant with the years. It cannot be consistent if the first twenty years are scaled together and the last 10 are put in increments of 2 years.
