Unit 3.1-3.5 Review :)

Which represents a unit rate?

• The cost of cat food is $36 per 3 bags.

• The cost of orange juice is $3 per jug.

• The cost of photocopies is $1 per 10 pages.

• The cost of roses is $50 per 2 dozen.

Bill spent $46.20 on 12 gallons of gasoline. What was the price per gallon?

• $8.35

• $3.85

• $2.59

• $0.26

Last week Alexander was paid $56 for 7 hours of work. How much money does Alexander's job pay per hour? $_ per hour

The rate at which an airplane flew was . How can the unit rate be determined?

• by writing an equivalent rate with a denominator of 1

• by writing an equivalent rate with a numerator of 1

• by writing an equivalent rate with a denominator of 2

• by writing an equivalent rate with a numerator of 2

Which size bottle of ketchup is the best deal with the lowest unit price?

Prices for Different Sizes of Bottles of Ketchup Size Bottle Price

10 oz. $2.50

14 oz. $2.80

16 oz. $4.00

18 oz. $5.40

A constant of proportionality can also be considered a(n)...

• unit rate.

• y-value.

• x-value.

• ratio.

What is the meaning of "Constant of Proportionality":

• converting one measurement system to another.

• one part in every hundred.

• One variable varies directly with the other variable. ('k') k= y/x

Sasha noticed that the graph of the sales of yearbooks represented a proportional relationship. How could she have calculated the constant of proportionality by looking at the graph?

• She could divide any y-value by its corresponding x-value.

• She could divide any x-value by its corresponding y-value.

• She could add any y-value to its corresponding x-value.

• She could subtract any x-value from its corresponding y-value.

Find the Constant of Proportionality (k) of the graph below.

Which is a valid proportion?

• $\frac{3}{4}\ =\ \frac{21}{28}$

• $\frac{5}{6\ }=\frac{29}{30}$

• $\frac{4}{7}=\frac{16}{49}$

• $\frac{2}{5}=\frac{12}{15}$