Graphing Proportional Relationships
Equations of Proportional Relationships
Identifying Proportional Relationships
Solve Unit rate
Integers
100
What numbers/ordered pair are at the origin of a graph?
(0,0)
100
Is this equation proportional? y= 3x
If so what is the constant of proportionality? (K)
Yes
k=3
100
How do you find the "k" value?
y divided by x
100
Jude sends 45 E-mails in 15 minutes.
How many E-mails did he send per minute?
He sent 3 E-mails per minute.
100
What it is - 6 times -7
42
200
Using this graph, What is being compared? 
earth weight to moon weight
200
Is this equation proportional? If so what is the constant of proportionality? (K=)
y= ¾ x
proportional
k= 3/4
200
Is the graph a proportional relationship? Why?
NO
Does not go through the origin
200
Lenasia earned $640 in a 40-hour work week.
What is Lenasia's hourly rate of pay?
Lenasia earns $16 per hour.
200
what is -9 + -7
-16
300
State if the line is proportional or not.
This line is not proportional. It is a line, but it does not go through the origin.
300
Using this graph, What is the equation?
y= 1/6x
300
Is the table proportional?
Yes it is proportional
300
A helicopter propeller spins 2400 revolutions in 4 minutes. What is the constant of proportionality (k), in revolutions per 1 minute?
The constant of proportionality is k = 600 RPM.
300
what is -1 + -1 + -1
-3
400
Are all straight line graphs proportional relationships?
no
400
Write an equation for the table given the table is proportional.
Y= 3/2 x
400
Is this table proportional ?
yes, it is
400
Janine sells 16 apples for $8.00. What is the unit price for each apple?
The unit price is $0.50 per apple.
400
What is -1 times -1 times -1
-1
500
what are 2 ways to tell if a graph is proportional
if the line is straight
goes through the origin
500
Write an equation that shows the proportional relationship.
y =12x
500
Is this table proportional?
yes
500
Jeff earned $400 working a 40-hour work week.
Find Jeff's hourly wage and use it to predict how much he will make if he works for 47 hours.
Jeff makes $10 per hour and would make $470 IN 47 hours.
500
What does COP mean?
constant of proportionality