Exploring Ratios with Double Number Lines

The video tutorial explains how to use double number lines to understand ratios and costs. It starts with an example of calculating the cost of avocados, showing how to determine the price per pound using a ratio. The tutorial then moves to a scenario involving model trains, illustrating how to maintain a consistent ratio of weeks to trains built. Finally, it covers a snowball-making example, demonstrating how to calculate the number of snowballs made per minute using ratios. Each section emphasizes understanding and applying ratios in different contexts.

What does the double number line represent in the context of avocados?

• The weight of avocados over time

• The cost of avocados as the weight increases

• The number of avocados sold

• The price fluctuation of avocados

If 5 pounds of avocados cost 9 dollars, what is the cost of 1 pound?

• 1.5 dollars

• 1.8 dollars

• 2 dollars

• 2.2 dollars

How do you calculate the cost of 1 pound of avocados from the given ratio?

• Divide 9 by 5

• Add 5 to 9

• Multiply 5 by 9

• Subtract 5 from 9

What is the cost of 2 pounds of avocados?

• 3.6 dollars

• 5 dollars

• 4 dollars

• 4.5 dollars

How many trains can Irene build in one week?

• 5 trains

• 7 trains

• 9 trains

• 11 trains

What is the ratio of weeks to trains built by Irene?

• 1:11

• 1:5

• 1:7

• 1:9

If Irene builds 45 trains, how many weeks does it take?

• 3 weeks

• 4 weeks

• 5 weeks

• 6 weeks

How many snowballs can Jacob and his friends make in one minute?

• 16 snowballs

• 14 snowballs

• 12 snowballs

• 10 snowballs

What is the ratio of minutes to snowballs made by Jacob and his friends?

• 1:16

• 1:14

• 1:12

• 1:10

If Jacob and his friends make 60 snowballs, how many minutes does it take?

• 4 minutes

• 5 minutes

• 6 minutes

• 7 minutes