the graph most accurately represents this scenario is the graph that started at (0,0) and goes up diagonally upward to a point ( 0.5 hr, y1). then goes horizontally straight for 2 hours because it does not travel just shopping (2.5, y1). then another diagonally upward to (2.75, y2). then another horizontal for 1 hr. (3.75, y2)
