Understanding Rates and Ratios

Mrs. D introduces ratios and rates, explaining how to write and reduce ratios, and how to calculate unit rates. The video includes examples and practice problems to reinforce understanding. Ratios compare two items, while rates compare different units. The video concludes with a summary of key concepts.

What is a ratio?

• A measure of speed

• A comparison of different units

• A type of fraction

• A comparison of two items or one item to the total amount

How can you write a ratio?

• Using a semicolon

• Using a dash

• Using a plus sign

• Using the word 'to', a colon, or as a fraction

What is the reduced form of the ratio 2 to 6?

• 1 to 2

• 1 to 3

• 2 to 3

• 3 to 1

What distinguishes a rate from a ratio?

• A rate compares two items of the same unit

• A rate is always larger than a ratio

• A rate compares different units

• A rate is a type of ratio

How is a rate typically expressed?

• As a percentage

• As a fraction

• As a decimal

• As a whole number

What is the unit rate if John drives 142 miles in 2 hours?

• 35.5 miles per hour

• 142 miles per hour

• 284 miles per hour

• 71 miles per hour

What is the purpose of finding a unit rate?

• To calculate the total cost

• To find the rate of one item compared to the original amount

• To compare two items of the same unit

• To determine the speed of a vehicle

How do you find the cost per ounce of cereal if a 24-ounce box costs $2.88?

• Subtract the number of ounces from the total cost

• Add the total cost to the number of ounces

• Divide the total cost by the number of ounces

• Multiply the total cost by the number of ounces

What is the cost per ounce if a 24-ounce box of cereal costs $2.88?

• $0.24

• $0.12

• $0.48

• $0.36

Why might larger boxes of cereal offer a better price per ounce?

• They are more popular

• They are always on sale

• They have more packaging

• They often have a lower cost per ounce