# Identifying proportional relationships

6 videos

1 skill

Learn how to tell whether two quantities are proportional by thinking about equivalent ratios and drawing graphs.

### Introduction to proportional relationships

VIDEO
3:50 minutes

The relationship between two variables is proportional if

### Proportionality between side length and perimeter

VIDEO
2:39 minutes

Is the perimeter of a square proportional to the side length of the square?

### Testing whether area is proportional to side length

VIDEO
3:46 minutes

Is the volume of a square proportional to the side length of the square?

### Identifying a proportional relationship from a table (example)

VIDEO
1:03 minutes

Given a table of ratios, watch as we test them for equivalence and determine whether the relationship is proportional.

### Movie ticket proportionality

VIDEO
1:46 minutes

When going to the movies, is the price you pay proportional to the number of tickets you buy?

### Identifying proportional relationships

PRACTICE PROBLEMS

Practice telling whether or not the relationship between two quantities is proportional by reasoning about equivalent ratios.