Answer:
1. 2nd and 3rd for the highlight part; (0, 0) means there were no days and no classes; The unit rate means the number of classes there are per day.
2. 1st and 4th for the highlight part; (0, 0) means there were no students and teachers; The unit rate means the number of students there is for teachers.
3. No, because the x represents the number of games and the y represents the number of points in each game; (2, 24); (2, 24) means that in game 2, a team scored 24 points.
4. 1st and 2nd for the highlight part; (0, 0) means there are no students nor drawings; The unit rate means how many drawings the students did.
Hope this helped :)