Ratios/Unit Rates/Scale Factor/Proportions

Front

What is a ratio?

Back

A comparison of two quantities using the word 'to', for every/each, or a colon (:).

Front

What is a unit rate?

Back

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

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity.

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they express the same relationship between quantities.

Front

How do you find a missing side length in similar figures?

Back

Set up a proportion using the known side lengths and solve for the missing length.

Front

If a car travels 280 miles in 7 hours, what is its unit rate in miles per hour?

Back

40 miles per hour.

Front

How do you write a proportion?

Back

A proportion is written as an equation stating that two ratios are equal.

Front

What is the relationship between unit rates and proportions?

Back

Unit rates can be used to set up proportions to solve for unknown quantities.

Front

If Mrs. Ayala paid $3 for 6 muffins, what is the cost per muffin?

Back

$0.50 per muffin.

Front

If Mrs. Barton paid $9 for 18 muffins, what is the cost per muffin?

Back

$0.50 per muffin.