Understanding Ratios and Rates

Mrs. Lopez introduces seventh graders to proportional relationships, focusing on ratios, rates, and unit rates. The lesson covers vocabulary, examples of class ratios, and practical applications like determining the better buy. Students learn to calculate unit rates in various contexts, enhancing their understanding of proportional relationships.

What is the primary focus of the seventh-grade curriculum module introduced by Mrs. Lopez?

• Understanding algebraic expressions

• Exploring geometric shapes

• Learning about proportional relationships

• Studying historical events

How can a ratio be expressed?

• As a sum of numbers

• As a product of numbers

• As a difference of numbers

• As a fraction, with a colon, or using the word 'to'

What makes two ratios equivalent?

• They have equal values when simplified

• They have the same difference

• They have the same product

• They have the same sum

What is a rate?

• A comparison of two similar quantities

• A comparison of two different quantities

• A sum of two numbers

• A product of two numbers

How do you find the unit rate?

• By subtracting one quantity from another

• By dividing one quantity by another

• By multiplying the quantities

• By adding the quantities

In the example of buying pencils, what is the better buy?

• Both are the same

• 12-pack for $4.17

• Neither is a good buy

• 30-pack for $7.97

What is the unit rate for 560 miles in 8 hours?

• 80 miles per hour

• 60 miles per hour

• 90 miles per hour

• 70 miles per hour

How many words per second are there if you type 120 words in 8 seconds?

• 20 words per second

• 10 words per second

• 12 words per second

• 15 words per second

If you have 21 necklaces made in 3 days, how many necklaces are made per day?

• 8 necklaces per day

• 7 necklaces per day

• 6 necklaces per day

• 5 necklaces per day

What is the cost per pound if you buy 4 pounds for $5.48?

• $1.22 per pound

• $1.37 per pound

• $1.48 per pound

• $1.52 per pound