The quantities of T-shirts in the advertisement that represent a unit rate is $10 per shirt.
Option C represents a unit rate.
- There are 5 shirts in the image given to us composed of 3 white shirts and 2 black shirts.
- Unit rate is simply defined as a rate that has 1 as its denominator.
- Option A; 3 white shirts to 2 white black shirts means ratio of 3:2 or a fraction of 3/2.
This can't be a unit rate because the denominator is not 1.
- Option B; 2 black shirts for every 5 white shirts. This can't be a unit rate because it will have a fraction of 2/5 where the denominator is not 1
- Option C: $10 per shirt. This is a unit rate because it denotes a ratio of 10:1 or a fraction of 10/1. So it means that cost of 5 shirts will be $50.
- Option D: $50 per shirt. This would not be a unit rate in this question because option C has given us a more simplified amount at $10 which we will have to take since we are dealing with unit rates.
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