Proportional Relationships and Unit Rate

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $35 per pound

• $5 per pound

• $0.125 per pound

A unit rate is a rate in which the unit in the denominator is:

• 0

• 3

• 1

• 2

How do you find the constant rate, or the constant of proportionality?

• k = t + x

• k = x/y

• y = k - x

• k = y/x

Solve the proportion.

• k=5

• k=45

• k=60

• k=90

Imani compared the number of fluid ounces per bottle of sunscreen to the cost of four different brands of sunscreen. The information she gathered is shown in the table. Based on the data in the table, brand ​ (a)   of sunscreen has the greatest cost per fluid ounce.

• x

• w

• y

• z

In a proportional relationship, the unit rate is called a

• ratio

• constant of proportionality

• graph

Calculate the unit rate: If a cyclist travels 120 miles in 4 hours, what is the speed in miles per hour?

• 25 mph

• 30 mph

• 35 mph

• 40 mph

• A
• B
• C
• D

Unit rate is defined as . . . 

• a comparison of two measurements; the second measurement has a value of one

• a comparison of any two measurements

• something to do with ratios

• cost of something

?

Mathematical Equivalence

ON