Let's break down the problem by identifying whether each rate is a "Unit Rate" or "Not a Unit Rate."

A unit rate is a ratio where the denominator is 1, typically expressed as something per 1 unit of measure.

Analysis of Each Rate:

1. 60 miles per hour – This is a unit rate because it's per one hour.
2. 168 hours in 7 days – This is not a unit rate because it's per 7 days, not per one day.
3. 34 miles for each gallon – This is a unit rate because it's per one gallon.
4. $15 for 2 DVDs – This is not a unit rate because it's for 2 DVDs, not one.
5. $8 for every hour – This is a unit rate because it's per one hour.
6. 22 words per minute – This is a unit rate because it's per one minute.

Final Classification:

Unit Rate:

• 60 miles per hour
• 34 miles for each gallon
• $8 for every hour
• 22 words per minute

Not a Unit Rate:

• 168 hours in 7 days
• $15 for 2 DVDs

Would you like further explanation or details on any part of this? Here are some related questions:

1. How do you calculate a unit rate from a given ratio?
2. What are some examples of unit rates in real-life situations?
3. How do unit rates help in comparing quantities?
4. How can you convert a non-unit rate to a unit rate?
5. How are unit rates used in speed, price, or efficiency calculations?

Tip: To identify a unit rate, look for how much of one thing there is per 1 unit of another (e.g., per 1 hour, per 1 gallon).