Constant of Proportionality
Proportionality in Tables
Proportionality in Equations
Proportionality in Graphs
Proportional vs Non Proportional
100
What is the ratio to find the constant of proportionality?
y/x = k
100
What is the constant of proportionality?
13
100
What is the multiplicative equation that describes a proportional relationship? Use the variables k, x & y.
y = kx
100
The two requirements for a graph to be proportional are that:
It must be a straight diagonal line
It must start at the origin (0,0)
100
Aaron thinks that this graph is proportional because it starts at the origin. Do you agree with Aaron? Why or why not? 
No, the line must be a straight diagonal line.
200
What is the equation we use WITH the constant of proportionality?
y=kx
200
James says that this table is proportional because you can add six. Do you agree with him?
No, you can not add with proportional relationships. You can only multiply or divide.
200
In the equation y = 1260x, what is the constant of proportionality?
1260
200
Does this graph represent a proportional relationship? 
Yes, it is proportional
200
Does this graph represent a proportional relationship? 
No
300
Which one of these is NOT a constant of proportionality?
A) y=1x
B) y=12x
C) y=(1/2)x
D)y=x^2
D) y=x^2
300
What is the constant of proportionality?
0.5 or 1/2
300
Which equation does not describe a proportional relationship?
A. y = 10x
B. y/x = 7
C. x + 3 = y
D. y/56 = x
C. x + 3 = y
300
What does x represent on this graph? What does y represent on this graph?
x = Earth weight
y = Moon weight
300
Which student's graph is proportional? How do you know?
Morgan
400
If y = 3x and for every 2 people there are 6 cookies; what is my constant of proportionality?
3
400
How much money can be made after 6 hours of work?
$54
400
Tanya can make $10 for every bracelet she sells. She knows that her equation is y = 10x, where y equals the amount of money she can make and x equals the amount of bracelets. How much money can she make if she sales 5 bracelets?
$50
400
For every 6 pounds the earth weighs, the moon weighs what?
1 pound
400
What is the constant of proportionality in this graph?
There is no constant of proportionality because this graph is non-proportional.
500
I can find the constant of proportionality by finding the "per one". What is this also known as?
The unit rate
500
What are the two constant of proportionality for this table?
3/2 & 2/3
500
Tanya can make $10 for every bracelet she sells. She knows that her equation is y = 10x, where y equals the amount of money she can make and x equals the amount of bracelets. How many bracelets will she sell if she makes $600?
60 bracelets
500
What is the constant of proportionality shown in the graph?
1/6
500
Would this table make a proportional or non-proportional graph? How do you know? 
Proportional. The c.o.p. is 1/5 (every x is being divided by 5)