Constant of Proportionality, Unit Rates, and Constant Rates

Based on the information in the table, what is the constant of proportionality?

• k = 8

• k = 20

• k = 5

• k = 10

What is the constant of proportionality?

• $3

• $4

• $2

• $9

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

• k = t + x

• k = x/y

• y = k - x

• k = y/x

Game Stop sees 120 customers in 8 hours. What is the unit rate (in customers per hour)?

• 15

• 12

• 20

• 14

Which best describes the graph represented in this table?

• proportional

• non-proportional

What does the y-intercept represent?

• It costs $30 for each mile drive.

• There is an initial charge of $30 for the moving van.

• There is an initial charge of $2 for the moving van.

• It costs $1 for every 2 miles driven.

Is this table proportional?

• yes

• no

• I'm not sure, I need extra help!

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk

• 1.75 cups milk

• 2 cups flour

• 2.25 cups milk

A proportional relationship can be written as an equation in the form ____ = _____  _____

• y = k+x

• y = k-x

• y = kx

• y = k/x

Ms. Klion paid $15.00 for 6 gallons of gasoline.
What was the price PER gallon?

• $0.40

• $0.25

• $2.50

• $0.90