Proportional Relationships on a graph
Proportional Relationships with equations
Identifying Proportional Relationships
Solving Stuff
Circles
100
What ordered pair is used for the origin?
(0,0)
100
Is the equation y= 3x proportional?
If so, what is the constant rate? (k)
Yes
k = 3
100
Proportional or Nonproportional? 
Yes
100
True or False: Constant Rate, Slope and Unit Rate are the same in a proportional relationship.
True
100
What are BOTH formulas for the circumference of a circle?
C=pid
C=2pir
200
How do you tell if a graph represents a proportional relationship?
It is a straight line through the origin or if y/x is constant rate.
200
Is this equation proportional? If so what is the constant rate? (k =)
y= 4x + 10
It is not proportional
200
Why is this not proportional?
It does not go through the origin!
200
Solve
n=3.8
200
What is the formula for the AREA of a circle?
A = pir^2
300
True or False: All straight lines have proportional relationships.
False
300
Is the equation y= ¾x proportional?
If so, what is the constant rate? (k)
It is proportional
k = 3/4
300
..Why is this not proportional?
It does not have a constant rate.
If you divide the y's and x's, you get
24... 22.5 ... 26... 25... respectively!
300
This table is proportional. What is the constant rate?
13 apples per tree
300
What is the Circumference of a Circle whose radius is 6.5 inches? (Use 3.14 as pi)
40.82 inches
400
Why is this graph proportional?
Because it goes thru the origin and has a constant rate.
400
Using this graph, what is the equation? 
y= 1/6x
400
Why is this proportional? Be specific!
The pairings all have a constant rate of 9.
400
The change of x is 2 and the change of y is 6.
What is this constant rate?
3
400
If the Circumference of a Circle is 20pi cm, what is the area (in terms of pi?)
100pi
500
Mr. McDonnell drives 390 miles away in 6 hours. What is the ordered pair for this situation?
(6, 390)
500
Write an equation for the proportional relationship shown in the table.
y = 3/2 x
500
Using at least one math term, what do these two equations have in common?
y = 4x + 2
y = 4x
They both have the same slope/constant rate.
They are both straight lines.
500
Mr. Yamamoto took 8 hours to drive 272 miles. How many miles per hour does he drive?
34 mph
500
The circumference of a circular high school track is 120pi meters. In terms of pi, how many meters would you run if you ran 15 laps?
1800pi meters