Find Constant of Proportionality

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

The constant of proportionality can be found by finding the __________  _____________.

• unit rate

• ratio rate

• proportion answer

• rational number

Which math operation do we associate with the constant of proportionality ?

• division

• multiplication

• addition

• subtraction

What is the constant of proportionality for this table ?

• 1

• 2

• Doesn't have one

Write the equation for the table given.

• y = 16x

• y=8x

• y=12x

At a school carnival, tickets can be purchased to participate in different activities. The table shows the cost of different numbers of tickets. What is the constant of proportionality that relates y, the total cost in dollars to x, the number of tickets purchased?

• $4.00

• $0.25

• $1.00

• $0.10

A recipe says to use 3 cups of flour to make 48 cookies. What is the constant of proportionality that relates the number of cookies made, y, to the number of cups of flour used in, x?

• 0.6

• 48

• 3

• 16

Cheddar Cheese cost $4.25 per pound. Which equation best represents y, the total cost of x pounds of cheddar cheese?

• x = 4.25y

• y = 4.25x

• y = 4.25 - x

• y = 4.25 + x

Identify the constant of proportionality.

• k = 2

• k = 4

• k = 1/2

• k = 1/4

• none (not proportional)

Identify the constant of proportionality.

• k = 1/0.45

• k = 0.45

• k = -0.45

• k = -1/0.45

• none (not proportional)