(c) Find the net change in the person'sweightWfrom age10toage50.
lb

W (lb) 200- 150+ 100- 50 + + 이 10 20 30 40 50 60 70 (yr) (a) Determine the intervals on which the function W is increasing. (Select all that apply.) 0 (0, 30) 0 (0, 40) (30, 32) (30, 40) (32, 68) Determine the intervals on which the function W is decreasing. (Select all that apply.) 0 (0, 30) 0 (0, 40) (30, 32) O (30, 40) O (32, 68) (b) What do you think happened when this person was 30 years old?