Constant of Proportionality and Unit Rates

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

• $.50 per pound

• $1.25 per pound

• $3 per pound

• $2.50 per pound

Identify the constant of proportionality.

• k = 5

• k = 1/5

• k = 1

• k = 2.5

• None (not proportional)

What is the constant of proportionality for the following graph?

• 80

• 20

• 40

• 160

When are unit rates useful? Choose the best answer.

• When you want to subtract a number by another.

• When you want to multiply one number by another.

• When you want to compare prices.

• When you want to figure out the probability of a number.

Which graph shows a proportional relationship?

• A

• B

• C

• D

Which statement matches the graph?

• Taylor can write 6 words per minute

• Taylor can write 25 words per minute

• Taylor can write 50 words per minute

• Taylor can write 150 words per minute

Does this graph represent a proportional relationship?

• Yes 

• No

What letter stands for "constant of proportionality"?

• y

• x

• b

• k

What is the unit rate? Julio walks 2½ miles in 2 hours.

• 1½ miles/hour

• 1¼ miles/hour

• 2 miles/hour

• ¾ miles/hour

Which best describes the graph represented in this table?

•  proportional

• non-proportional