Proportionality: Ratios and Rates

The comparison of two quantities using division is called a ___.

• value

• ratio

• century

• decimal

If the ratio of swans to geese is 3:21 is a medium pond, which of these represents an equivalent ratio for a larger pond?

• 42 swans to 6 geese

• 7 swans to 1 goose

• 6 swans to 24 geese

• 9 swans to 63 geese

At the city pool there is 2 lifeguards for every 70 swimmers. How many lifeguards are needed for 210 swimmers?

• 6

• 5

• 4

• 3

A ratio that compares two numbers with different units of measure, like 60 mins to run 7 miles, is called a ___.

• equation

• mph

• rate

• reason

Unit rates can be used to compare products. If a box of Girls Scout cookies cost $5 and has 44 cookies, what is the unit price, or cost per cookie?

• 0.11

• 8.8

• 39

• 0.16

In a survey, 20% of the people surveyed preferred cats over dogs. If 80 people were surveyed, how many preferred cats?

• 16

• 20

• 64

• 40

For a linear function that goes through the origin, the ratio of y divided by x is called the ___.

• proportional reasoning

• constant unit

• constant of proportionality

• percent ratio

What is the k value for this relationship?

• 8

• 4

• 1/4

• 0.24

Write 34% in simplified fraction form.

• 34/100

• 17/50

• 12/50

• 3/4

There are 10 dimes, 8 quarters, and 5 nickels?  What is the ratio of dimes to nickels?

• 10 to 5

• 5 : 10

• 1 : 2

• 2 to 1