Understanding Unit Rates

This lesson introduces the concept of rates, distinguishing them from ratios by using real-world examples. Ratios compare the same units, while rates compare different units, such as price per item. The lesson provides examples of unit rates, like cost per gallon and speed per hour, to illustrate how rates function in everyday situations. By the end, students should understand the difference between rates and ratios and how to apply unit rates in various contexts.

What is the primary difference between a ratio and a rate?

• Ratios are used for time comparisons, while rates are not.

• Ratios and rates are exactly the same.

• Ratios compare the same units, while rates compare different units.

• Ratios compare different units, while rates compare the same units.

Which of the following is an example of a rate?

• A gallon of gas to its price

• Three cups of flour to two cups of sugar

• Two apples to three apples

• Four red apples to two green apples

If a gallon of milk costs $3, how would you express this as a rate?

• $3 per gallon

• 3 gallons per dollar

• $3 for 3 gallons

• 3 gallons for $3

Fiddo can eat 12 ounces of dog food in one minute. What is the unit rate?

• 1 ounce per hour

• 12 ounces per hour

• 12 ounces per minute

• 1 ounce per minute

Derrick walks four miles in one hour. What is his walking speed expressed as a unit rate?

• Four miles per minute

• One mile per hour

• Four miles per hour

• One mile per minute