Answer:
Option C From day 7 to day 8
Explanation:
The given graph shows the total number of hours Katrina worked over the period of 10 days.
Now we will calculate the number of hours worked by Katrina for every given options in the question.
Option A - From day 1 to day 2
Katrina worked (6 - 3) = 3 hours
Option B - From day 4 to day 5
Katrina worked (12-12) = 0 hours between the period of 4 to 5 days
Option C - From day 7 to day 8
Katrina worked (18-12) = 6 hours
Option D - From day 9 to day 10
Katrina worked ( 18 - 18) = 0 hours so she took the rest.
According to this, options C represents the work done for maximum hours in one day interval.