Understanding Proportional Relationships

Mr. L introduces a Grade 7 math lesson on proportional relationships, skipping the first lesson due to its inapplicability in distance learning. The lesson covers four examples: a frozen yogurt store, recipe book conversions, a physical education class, and a summer job. Each example demonstrates how to determine if a relationship is proportional by calculating unit rates. The video concludes with instructions for homework and encourages students to ask questions if needed.

What is the main focus of lesson two in the Grade 7 math module?

• Distance learning techniques

• Proportional relationships

• Algebraic expressions

• Geometry basics

In the frozen yogurt example, what must be consistent for the cost to be proportional to the weight?

• The unit rate

• The size of the dish

• The toppings used

• The type of yogurt

How do you determine if a relationship is proportional in the context of the frozen yogurt example?

• By checking if the price changes with different weights

• By comparing the flavors of yogurt

• By measuring the temperature of the yogurt

• By ensuring the unit rate is the same for all data sets

In the recipe book example, what operation is used to determine proportionality?

• Multiplication

• Subtraction

• Division

• Addition

What is the unit rate used in the recipe book example to convert measurements?

• 4

• 2

• 8

• 16

In the exercise example, how many calories are burned per minute?

• 5

• 10

• 11

• 15

If Jose jumps rope for 6.5 minutes, how many calories will he burn?

• 75

• 71.5

• 65

• 72

What is the unit rate of Alex's earnings per week?

• 20 dollars

• 25 dollars

• 28 dollars

• 30 dollars

By the end of the summer, how much money will Alex have earned?

• 280 dollars

• 250 dollars

• 224 dollars

• 196 dollars

Why are Alex's earnings considered proportional to the weeks he worked?

• He spent the same amount each week

• He earned the same amount each week

• He earned a different amount each week

• He worked the same hours each week