M6 Ch 5 Rates Review

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, often expressed as a fraction. For example, speed is a rate that compares distance to time.

Front

How do you solve a proportion?

Back

To solve a proportion, you can cross-multiply the two ratios and set them equal to each other. For example, if a/b = c/d, then ad = bc.

Front

What is the unit rate?

Back

A unit rate is a rate in which the second quantity is one. For example, if a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

Front

How do you find the best buy when comparing prices?

Back

To find the best buy, calculate the price per unit (e.g., price per ounce) for each option and compare them. The option with the lowest price per unit is the best buy.

Front

What is the formula to calculate speed?

Back

Speed = Distance ÷ Time. This formula helps determine how fast an object is moving.

Front

If a recipe calls for 2 cups of an ingredient for 3 servings, how much is needed for 6 servings?

Back

You would need 4 cups of the ingredient for 6 servings, as it doubles the amount.

Front

What is the average speed if a person travels 60 miles in 2 hours?

Back

The average speed is 30 miles per hour, calculated by dividing distance by time (60 miles ÷ 2 hours).

Front

How do you calculate the total cost of an item with a given price and quantity?

Back

Total Cost = Price per Item × Quantity. For example, if an item costs $5 and you buy 3, the total cost is $15.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, 1/2 = 2/4 is a proportion.

Front

How do you convert a rate to a unit rate?

Back

To convert a rate to a unit rate, divide both quantities by the same number so that the second quantity equals one.