Question

Which of these is a unit rate?

18 students in a class


18 students in 18 chairs


18 students in 6 rows


18 students in 2 reading groups

Answer 1

A unit rate is a rate in which the second term is 1. Therefore, the unit rate of "18 students in a class" is 18 students per 1 class.

Answer 2

the unit rate is:

18 students in a class

This is a unit rate because it compares the number of students (18) to one unit of another quantity (1 reading group).