The teacher kept track of how long it took students to finish a test. After 20 minutes, 3 students had finished the test. How many students were finished after 70 minutes? 7 8 9 10 Graph showing how many minutes it took students to finish a test. Horizontal axis labeled Time minutes Coordinate pairs are plotted on the graph at 20,3, 30,3, 40,4, 50,8, 60,8, 70,9, 80,10, 90,11,100,13,110,13,120,14.