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.

10 cans per week is a unit rate because it compares 10 cans to 1 week, which is a direct comparison to 1 unit of time.

For option A, 45 grams in 9 packets

This is not a unit rate because it compares 45 grams to 9 packets, not 1 packet. To turn this into a unit rate, you would divide 45 grams by 9 packets.