PMA and PCL are names of buildings, didn't want to confuse you.

15. 10 pts possible A Calculus student leaves the PMA build- ing and walks in a straight line to the PCL 1. away from PMA at 30 yds/ min Library. Their distance from PMA after t minutes is given (in yards) by the graph 2. away from PMA at 45 yds/min 3. towards PMA at 45 yds/min 400 4. away from PMA at 60 yds/ min 320+ 240 5. towards PMA at 60 yds/ min 160 80 + 6 8 10 12 t What is their speed after 3 minutes, and in what direction are they heading at that time