according to the line plot what is the total amount of time spent studying by all students who studied 1/4 hour or 3/4 hour

Answer:
2 3/4 hours
Step-by-step explanation:
if you total the students who studied 1/4 hour you get 2/4 hour and if you total the students who studied for 3/4 hour you get 2 1/4 if you add 2 1/4 and 2/4 you get 2 3/4