Question

Martin walked away from his school at a constant velocity for the first 30 seconds. He realized that he had to pick up a book from his friend's house, which he had already passed. He turned around and walked to his friend's house at a constant velocity for 10 seconds. He stopped at his friend's house for 40 seconds and then walked away from school again at a constant velocity for the next 20 seconds. Which of the following graphs best represents Martin's motion?

Answer 1

Answer choices are in the attachment above. ^

Answer 2

The person who answers correctly will be fanned and given a medal. Good luck!