Graphing Proportional Relationships
Equations of Proportional Relationships
Identifying Proportional Relationships
Solve
Study Guide
100
What are the coordinates of the origin?
(0,0)
100
Is this equation proportional? y= 3x
If so, what is the constant of proportionality (K)?
Yes
k=3
100
Are these ratios proportional? 
Yes
100
What is the ratio for the Constant of Proportionality?
y/x
100
Christian drives 96 miles in 1.5 hours. What is his speed in miles per hour?
What is 64 miles per hour
200
a relationship in which two ratios are equivalent
proportional
200
Is this equation proportional? If so, what is the constant of proportionality?
y= 4x + 10
Not proportional
200
Is the graph a proportional relationship? Why?
NO
Does not go through the origin
200
Solve
n=3.8
200
What is another name for unit rate? Hint: Three words
What is Constant of Proportionality
300
What are 2 ways to tell if a graph is proportional?
-a straight line
-goes through the origin
300
Is this equation proportional? If so what is the constant of proportionality? (K=)
y= ¾ x
proportional
k= 3/4
300
Is the table proportional?
No
300
Given the table is proportional. Solve for K
K = 13
300
Morgan pays $1.25 for a soda for each of her friends. If she is buying soda for 4 friends, how much will she spend?
What is $5
400
Is this graph proportional?
YES
400
Using this graph, What is the equation? 
y= 1/6x
400
Is the table proportional?
Yes it is proportional
400
y/x=6/2
What is this constant of proportionality?
k=3
400
Isabella is buying candy bars for her friends. The candy bars cost $1.05. She is buying them for 3 friends, costing her a total of $3.15. What is the constant of proportionality in this situation?
What is $1.05
500
is this graph a proportional relationship ?
Yes
500
Write an equation for the table given the table is proportional.
Y= 3/2 x
500
a) yes
500
8.75 hours
500
The point (1, r) on a graph, what does r mean?
What is unit rate?