Enrollment at Roosevelt Middle School is being reviewed by the school staff. The table gives the numbers of boys and girls in grades 6 to 9.
Grade Girls Boys
6 9 12
7 12 18
8 15 20
9 25 36
In which two grades is the relationship between the numbers of girls and boys proportional?
Grade Girls Boys
6 9 12
7 12 18
8 15 20
9 25 36
In which two grades is the relationship between the numbers of girls and boys proportional?