COP Practice ENR

Identify the constant of proportionality.

• k = 2

• k = 4

• k = 1/2

• k = 1/4

• none (not proportional)

Does this equation represent a proportional relationship?

• Yes
• No

Does this equation represent a proportional relationship?

• Yes
• No

Write an equation for this relationship

• y=2x

• y=3x

• y=1.50x

• y=2/3x

• none (not proportional)

Determine the constant of proportionality for the table. Express your answer as y = kx

• y = 1/2x

• x = 1/2y

• y = 2x

• k = x

What is the constant of proportionality of the table given

• k = 1
• k = 3
• k = 2
• There is not one.

A recipe calls for 3/4 cup of brown sugar for every 3 eggs. What is the unit rate of eggs per cup? 

• 1 cup per egg
• 2 cups per egg
• 3 eggs per cup
• 4 eggs per cup

A student studies the same amount of time each day for a test. In 4 days, she studied 60 minutes. Which equation shows this relationship? Let x = the number of days.

• y = 4x
• y = 15x
• y = 60x
• y = 12x 

What is the EQUATION for this graph?

• y=80x

• y=20x

• y=40x

• y=160x

The constant of proportionality of this graph is k = 45. What does it mean?

• The boat travels for 45 miles for every 45 hours

• The boat travels 1 mile for every 45 hours

• The boat travels 45 miles for every 1 hour

• The boat travels 1/45 mile for every 1 hour