The frequency table below will be used to make a histogram.

test score
number of students
1 - 10
1
11 - 20
0
21 - 30
1
31 - 40
1
41 - 50
2
51 - 60
4
61 - 70
6
71 - 80
11
81 - 90
5
91 - 100
4

what is an appropriate scale and interval for this histogram?