Which is an example of a unit rate?
$5 for 2 pounds of apples
none of these
100 miles for every inch
55 miles per hour
The example of a unit rate among the given options is "55 miles per hour."
To identify a unit rate, we need to look for a ratio where there is a comparison between two different units, and the denominator of the ratio is fixed at 1.
In the given options:
- $5 for 2 pounds of apples: This is not a unit rate because the ratio is not fixed at 1 pound of apples.
- None of these: This is not an example nor a unit rate.
- 100 miles for every inch: This is not a unit rate because the denominator is not fixed at 1 inch.
- 55 miles per hour: This is a unit rate because we have a comparison between miles and hours, and the ratio is fixed at 1 hour.
Therefore, the correct answer is "55 miles per hour."