So in a week i have to take a final for egenuity, it has to be in person and this whole time of me doing online ive been cheating, might anyone know the questions going to be asked on the final?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point