Ratios and Rates: Rates

The video tutorial explains the concept of rates and unit rates. It begins with an introduction to rates using examples like hourly wages. The tutorial then demonstrates how to calculate unit rates through a pulse counting exercise, converting pulses per 10 seconds to pulses per minute. Finally, it provides another example by calculating the unit rate of calories per serving in a box of cereal, dividing total calories by the number of servings.

What is a rate?

• A fixed amount of money

• A comparison of two quantities with the same units

• A measure of speed

• A ratio involving two quantities in different units

If you count 15 pulses in 10 seconds, what is the unit rate of pulses per minute?

• 75 pulses per minute

• 60 pulses per minute

• 90 pulses per minute

• 100 pulses per minute

How do you calculate a unit rate?

• By adding the quantities together

• By dividing the total quantity by the number of units

• By multiplying the quantities

• By subtracting one quantity from the other

What is the unit rate of calories per serving if a box of cereal contains 1,320 calories and 12 servings?

• 130 calories per serving

• 100 calories per serving

• 120 calories per serving

• 110 calories per serving

In the context of the video, what does a serving refer to?

• A plate of cereal

• A bowl of cereal

• A spoonful of cereal

• A cup of cereal