The school bus picks up Brian in front of his house and takes him on a straight-line 2.3 km bus ride to school in the positive direction. He walks home after school. If the front of Brian's house is the origin, (a) what is the position of the school, (b) what is his displacement on the walk home, and (c) what is his displacement due to the combination of the bus journey and his walk home?
(a) (1/100 submissions used) km
(b) (1/100 submissions used) km
(c) (1/100 submissions used) km