# Proportional relationships

5 videos

2 skills

The concept of proportionality is pivotal to our understanding of how things in the universe are contructed. Proportional relationships in mathematics examine relationships between two equal ratios. For example, perhaps you're painting your bedroom and need to know how to mix 2 colors together to create a third color. Understanding the ratio of color 1 to color 2 determines your ability to know how many cans of both colors you need to paint your whole room in color 3. Pay attention because you'll find that these ideas will keep popping up in your life! Common Core Standards: 7.RP.A.2, 7.RP.A.2a, 7.RP.A.2b, 7.RP.A.2c, 7.RP.A.2d

### Analyzing and identifying proportional relationships

VIDEO
3:05 minutes

Keep in mind that you have a proportional relationship if the ratio between the variables is always the same. In this example we'll graph this relationship along an x and y axis to find our answer.

### Analyzing proportional relationships in a graph

VIDEO
1:41 minutes

Let's use our knowledge of proportional relationships to interpret a graph that maps out the number of hours spent on computer games vs hours spent on homework. We know which one you spend more time on!

### Analyzing proportional relationships from a table

VIDEO
1:03 minutes

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

### Analyzing and identifying proportional relationships

PRACTICE PROBLEMS

### Comparing proportional relationships

VIDEO
6:57 minutes

Here's a challenge: construct equations to determine if the relationships are proportional. Use your knowledge of algebra and graphs to compare ratios.

### Constructing an equation for a proportional relationship

VIDEO
2:47 minutes

Write an equation that describes the proportional relationship between a table of two variables. We're building on our knowledge of algebra and ratios and proportions.

### Constructing and comparing proportional relationships

PRACTICE PROBLEMS