Ratios, Unit Rates, and Proportions

Front

What are three ways to write a ratio?

Back

Front

Which of the following is NOT how a ratio is written? 3=4, 3 : 4, 3 / 4, 3 to 4

Back

3=4

Front

A skydiver falls 144 feet in three seconds. How far does the skydiver fall per second?

Back

48 feet per second

Front

If Anna can type 408 words in 4 minutes, how many words can she type per minute?

Back

102 words per minute

Front

You score 84 points in six games. How much do you score per game?

Back

14 points per game

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.

Front

How do you find a unit rate?

Back

To find a unit rate, divide the numerator by the denominator to express the quantity per one unit.

Front

What is a proportion?

Back

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

Front

How can you determine if two ratios form a proportion?

Back

Cross-multiply the ratios; if the products are equal, the ratios form a proportion.