Ratios and Proportional Relationships

This instructional video covers the concept of proportional relationships, starting with basic definitions and vocabulary. It explains how to identify proportional relationships using examples like recipes and taxi fares. The video also delves into more complex problems involving multiple components, such as mixing concrete and making slime. The lesson concludes with practical applications and a summary of key points.

What is the ratio of flour to water in the pizza dough recipe mentioned in the video?

• 2:1

• 1:3

• 1:2

• 3:1

Which of the following is an example of a non-proportional relationship?

• Doubling the ingredients in a recipe

• A 14-year-old being twice as old as a 7-year-old

• Mixing 1 part vinegar with 4 parts water

• A taxi ride costing $5 per mile

In the homemade glass cleaner example, what is the ratio of vinegar to water?

• 3:1

• 1:4

• 4:1

• 1:3

How can you determine if two ratios are proportional?

• By dividing them

• By cross-multiplying them

• By subtracting them

• By adding them

What is the cost per mile for Ayanna's taxi ride if she pays $25 for a 5-mile ride?

• $7

• $6

• $5

• $4

In the yarn example, what is the cost per yard for the first type of yarn?

• $0.06

• $0.04

• $0.05

• $0.07

How many pounds of sand are needed if Christine uses 25 pounds of cement?

• 62.5 pounds

• 37.5 pounds

• 25 pounds

• 50 pounds

In the slime recipe, how many times more water is needed compared to borax?

• 24 times

• 48 times

• 36 times

• 12 times

If Catalina uses 3 tablespoons of borax, how many tablespoons of white glue does she need?

• 48 tablespoons

• 24 tablespoons

• 96 tablespoons

• 72 tablespoons

How many cups of white glue are needed if 1 cup equals 16 tablespoons and Catalina uses 72 tablespoons?

• 3 cups

• 6 cups

• 5 cups

• 4.5 cups