Answer: The houses surveyed had between 1 and 10 rooms.
Step-by-step explanation:
The range of any data gives us a interval which contains all the data values and provides an indication of the dispersion of data its from minimum value to the maximum value.
From the histogram, the minimum number of rooms = 1
The maximum number of rooms = 10
Hence, the range of rooms in Henry's histogram is between 1 and 10 rooms.