Algebra-1

A unit rate is a ratio where the second quantity (the denominator) is 1. It represents how much of one quantity corresponds to a single unit of the other.

150 pages per 5 minutes is the option that is not a unit rate because it doesn't compare to 1 unit of time.

For option A, 20 books per month

This is a unit rate because it compares 20 books to 1 month. The second quantity (time) is 1 u...