From the graph I can see that the there are 22 students in class. I got this number by:
- adding 1 for the first one
- and then adding 6 for the 2nd one (7)
- +7 for the third one (14)
- then add another 6 (20)
- and then finally add 2 (22)
6 students finished one task
7 students finished 2 tasks
6 students finished 3 tasks
only 2 students completed all tasks
Ms Corbett feels happy about this. I think next time I can do more better by trying to work faster.