Proportional Relationships

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other quantity is constant.

Front

If James earns $66 for tutoring 3 hours, how much does he earn per hour?

Back

$22 per hour.

Front

How do you find the total amount earned in a proportional relationship?

Back

Multiply the rate of earning by the number of hours worked.

Front

What is the formula for a proportional relationship?

Back

y = kx, where k is the constant of proportionality.

Front

If there are 70 girls in the 7th grade and the ratio of boys to girls is 3:5, how many boys are there?

Back

42 boys.

Front

What does it mean for two ratios to be equal?

Back

It means that they represent the same relationship or proportion.

Front

If Inessa runs 3 laps in 10 minutes, how long will it take her to run 5 laps?

Back

16 2/3 minutes.

Front

What is the constant of proportionality in the equation m = 22d?

Back

22 is the constant of proportionality.

Front

How can you determine if two ratios form a proportion?

Back

Cross-multiply and check if the products are equal.

Front

What is an example of a proportional relationship in real life?

Back

The relationship between distance and time when driving at a constant speed.