Proportions - 7th grade

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you set up a proportion?

Back

To set up a proportion, you can use the format \( \frac{a}{b} = \frac{c}{d} \), where a, b, c, and d are numbers.

Tags

CCSS.7.RP.A.2C

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions.

Tags

CCSS.7.RP.A.2D

Front

If a 12-ounce bottle lasts 16 weeks, how long will an 18-ounce bottle last?

Back

24 Weeks

Tags

CCSS.6.RP.A.3B

Front

How do you determine if two ratios are proportional?

Back

Cross-multiply the ratios and see if the products are equal.

Tags

CCSS.7.RP.A.2A

Front

What is the formula to find a missing value in a proportion?

Back

If \( \frac{a}{b} = \frac{c}{x} \), then \( x = \frac{b \cdot c}{a} \).

Tags

CCSS.7.RP.A.2C

Front

What is a direct variation?

Back

Direct variation is a relationship between two variables where one variable is a constant multiple of the other.

Front

If a car travels 280 miles in 7 hours, how far will it travel in 12 hours?

Back

480 miles

Tags

CCSS.6.RP.A.3B

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.

Tags

CCSS.6.RP.A.3A

Front

How do you solve a proportion?

Back

Cross-multiply and then solve for the unknown variable.

Tags

CCSS.7.RP.A.2C