PLS HELP Elena starts to walk home from school but has to turn around and go back because she left something in her locker. On her way back home (the second time), she runs into her friend who invites her to the library to do homework with her. She stays at the library and then heads home to do her chores.

Which graph fits Elena's story.
A or B
Explain your thinking.
y-axis represent:_ and x-axis represent:_