Graphing Proportional Relationships
Equations of Proportional Relationships
Identifying Proportional Relationships
Solve
100
What is the ordered pair for the origin?
** Don't forget your parentheses around the ordered pair! **
(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 constant of proportionality?
Y/X
100
The Constant of Proportionality, Slope, and Unit Rate of Change are all the same for a proportional relationship? True or False
True
200
A relationship between two quantities that is changing at a CONSTANT rate is:
a. proportional
b. nonproportional
a. proportional
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
Given the table is proportional. What is the constant of proportionality?
K = 13
or K = 1/13
300
What are the two rules to know if a graph is proportional?
1. The line is straight (to show a constant rate)
2. The line goes through the origin (0,0)
300
Is this equation proportional? If so what is the constant of proportionality? (K=)
y= 4x + 10
Not proportional
300
Is the table proportional?
No
300
Solve the following proportional relationship
6 : 30
n : 19
n=3.8
400
Is this graph proportional? Explain WHY.
Yes, it is a straight line that goes through the origin.
400
Using this graph, What is the equation? Write your constant of proportionality as a FRACTION. 
y= 1/6x
400
Is the table proportional?
Yes it is proportional
400
Free Points!
YAY!!
500
A recipe for lemonade is given by the equation y = 4x where x represents the cups of lemonade mix and y represents the cups of water.
If Tyler had 16 cups of lemonade mix, how many cups of water would he need for each recipe?
64 cups of water
500
Write an equation for the table given the table is proportional.
y = 3/2 x
or y = 1 1/2x
or y = 1.5x
500
How do you know if a table is proportional?
When you divide the y value with its x value, you get the same constant of proportionality in each row.
500
Sam took 8 hours to drive 272 miles. What was the unit rate in miles per hour?
34 mph