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