Ch. 1.1 | Rates, Ratios, & Proportions

Question 1

Extremes

Answer 1

In the proportion (a)/(b) = (c)/(d), read “(a) is to (b) as (c) is to (d)”.

(a) and (d) are called extremes of the proportion

Question 2

Means

Answer 2

In the proportion (a)/(b) = (c)/(d), read “(a) is to (b) as (c) is to (d)”.

(b) and (c) are the means

Question 3

Proportion

Answer 3

An equation that states that two ratios are equal.

In the proportion (a)/(b) = (c)/(d), read “(a) is to (b) as (c) is to (d)”.

Question 4

Rate

Answer 4

A ratio that compares two quantities with different kinds of units.

Rates are often expressed in terms of units of time.

Question 5

Ratio

Answer 5

A comparison of two numbers or quantities, usually written as a fraction.

Ratios are usually expressed as a common fraction (a)/(b) in lowest terms. Ratios can be expressed as a:b or (a) to (b).