# Proportional and Nonproportional Relationships - PowerPoint PPT Presentation

1 / 6

7 th Grade Math Lesson Objective: Students will identify proportional and nonproportional relationships. Proportional and Nonproportional Relationships. Vocabulary. Proportional Two quantities that have a constant ratio Example: Nonproportional

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Proportional and Nonproportional Relationships

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

#### Presentation Transcript

Lesson Objective:

Students will identify proportional and nonproportional relationships.

## Proportional and Nonproportional Relationships

### Vocabulary

• Proportional

• Two quantities that have a constant ratio

• Example:

• Nonproportional

• Two quantities that do NOT have a constant ratio

• Example:

16 = 16

17 ≠20

### Identifying Proportional Relationships

• Ms. Cochran is planning a year-end pizza party for her students. Ace Pizza offers free delivery and charges \$8 for each medium pizza. Is the cost of an order proportional to the number of pizzas ordered?

16 = 16

Yes

### Identifying Proportional Relationships

• Uptown Pizzeria sells medium pizzas for \$7 each but charges a \$3 delivery fee per order. Is the cost of an order proportional to the number of pizzas ordered?

17 ≠20

No

### Identifying Proportional Relationships

• At the beginning of the school year, Isabel had \$120 in the bank. Each week, she deposits another \$20. Is her account balance proportional to the number of weeks since she started school?

140≠240

No

### Identifying Proportional Relationships

• A recipe for jelly frosting calls for 1/3 cup of jelly and 1 egg white. Is the number of egg whites used proportional to the cups of jelly used?

2/3= 2/3

Yes