Mix 1
Constant of Proportionality
Is it a proportion?
Mix 2
Mix 3
100

What 2 statements must be true in order to prove a proportional relationship on a graph?

striaght line passes through origin

100

State the constant of proportionality in the table below.

k = 5

100

YES

100

Ethan ran for 2 hours. In that 2 hours he ran 16 miles. Which equation shows Ethan's running rate of miles to hour?

A.  y = 8x

B.  y = 0.125x

A

100

The ordered pair (1, 5) indicates the unit rate of books to cost on the graph shown

What does the point on the graph represent?

A. 2 books costs $10

B. For $10 you can buy 2 books

A.  *Read the x value first 

200

If the table is supposed to show a proportional relationship, which y value is incorrect?

What should the correct y value be?


9 is incorrect.  The correct answer should be 37.5


200

Which equation has a constant of proportionality equal to 1/2?

A. 3y=3x

B. 3y=6x

C. 3y=9x

D. 6y=3x

D

200

NO

200

The graph below shows the relationship between the pounds of gummi bears bought at a candy store and the total cost, in dollars, for the gummi bears.

A) The point (0.25,1) shows the cost is $0.25 for 1 pound of bears.

B) The point (0.5, 2) shows that 0.5 pound of bears cost $2.00.

C) The point (1, 4) shows the cost is $4.00 for 1 pound of bears.

D) The point (2, 8) shows that 8 pounds of bears costs $2.00.

B

200

12 minutes

300

Select the option the does not represent a proportional relationship between x and y.

A) y=1/2x   B) y = x + 2   C) 3y = 9x

B

300

Identify the constant of proportionality from the graph below:

k = 3

300

NO

300

Ava earns $12 for each hour she babysits. If h= hours she babysits and p= her total profit, which TWO equations represent the money Ava makes when babysitting?

A. 12p = h

B. 12h = p

C. 1/12h = p

D. 1/12p = h

B and D

300

Write an equation to represent the cost

y=3.5x or y=3 1/2x

400

According to the graph, how many web visits did Tina make if she has 12 downloads?

36

400

A family drove 150 miles in 6 hours.  Write an equation in y=kx form to represent this situation.

y = 25x

400

y=3x+2

NO

400

What is the missing data to keep the table proportional?

7
400

Which equation represents the number of envelopes (e) to the number of sheets (s)?

A. y = kx

B. s = 1/2e

C. s = 2e

D. e = 2s

C

500

What point on the graph represents the unit rate?

(1,3)

500

The equation y=5x represents the cost of a West Creek t-shirt.  If the school orders 500 shirts, how much will they have to pay for the schools shirts?

A. $100  B. $2500    C. $5000  D. $500

B

500

YES

500

The points on the coordinate plane show the amount of red and yellow paint in each batch. What is the unit rate in terms of yellow paint to red paint?

A. (1, 2/3)

B. (1, 3/2)

B

500

The table below shows the cost of different t-shirts.  If Ms. Graham wanted to buy a shirt for all 125 of her students, how much would she pay?

$1000