To determine the number of teachers for 100 students, we start with the ratio given: 25 students for every 1 teacher.
We can create a ratio table based on this relationship:
| Students | 25 | 50 | 75 | 100 | |----------|----|----|----|-----| | Teachers | 1 | 2 | 3 | 4 |
From the table, we can see that for every increase of 25 students, there is an additional teacher. Therefore, the number of teachers for 100 students is 4.
Thus, the correct response is:
Students: 25, 50, 75, 100
Teachers: 1, 2, 3, 4