Definitions
True/False
Math Vocab in Action
100

What do we call a comparison of two numbers or amounts, like 2 to 3 or 4 to 5?

ratio

100

In a proportional relationship, if one quantity doubles, the other quantity also doubles.

True


100

In a proportional relationship, the ratio of the change in one quantity to the change in another is described by the ________ of proportionality.

constant

200

What term describes a ratio where the denominator is always 1, like $3 per item?

unit rate

200

A unit rate tells you how much of something there is per two units of another quantity.

False


200

A ________ is a special type of ratio where the second quantity is 1, such as speed measured in miles per hour.

Unit Rate

300

What do you call a ratio that compares two quantities of different kinds, like the cost of gas per gallon? 

Rate

300

Rates are always expressed as fractions where the numerator and denominator have the same units.

False

300

When the cost of 6 items is $24, the cost per item can be expressed as a ________ rate.

unit

400

What is the name of the number that tells you how much one quantity changes compared to another in a proportional relationship?

constant of proportionality

400

To find the constant of proportionality, you divide one quantity by the other in a proportional relationship.

True

400

When you compare two ratios and find that they simplify to the same value, they are said to be ________.

equivalent


500

What is it called when two quantities change in a way that keeps their ratio constant?

proportional relationship


500

In a proportional relationship, if the constant of proportionality is 2/3, then the ratio 8/12 is proportional to 12/8 

False

500

When comparing two ratios to determine if they represent a proportional relationship, you can use the method of ________ to check if the ratios are equivalent.

cross-multiplying