Writing an Equation for Proportions
Graphs
Proportions
Comparing Unit Rates
Constant of Proportionality
100
What is the slope of a line?
A. The horizontal distance between two points on a line.
B. The vertical distance between two points on a line.
C. The rate at which the y-coordinate changes compared to the x-coordinate between two points on a line.
D. The total distance between two points on a line.
C. The rate at which the y-coordinate changes compared to the x-coordinate between two points on a line.
100
How do you know if a graph is proportional?
It is a straight line and goes through the origin.
100
Marcus' car can go 528 miles on 12 gallons of gas. During a drive last weekend, Marcus used 8 gallons of gas. How far did he drive?
352 miles
100
The graph shows a proportional relationship between the number of miles Marco bikes and the number of hours. What equation relates the distance, y, and the time, x?
y = kx
so,
y = 15x
200
What does the term "Rise over Run" or Rise/Run refer to in mathematics?
A. The difference in the y-coordinates of two points on a line divided by the difference in their x-coordinates.
B. The method of finding the area under a curve.
C. The sum of the x and y-coordinates of a point on a line.
D. The maximum value a line reaches on a graph.
A. The difference in the y-coordinates of two points on a line divided by the difference in their x-coordinates.
200
The graph shows a proportional relationship between the total number of tennis balls and the number of cans. What does the point (2, 6) represent in this situation?
There are 6 tennis balls in 2 cans.
200
In a school, the ratio of boys to girls is 4 to 10. A school contains 350 girls. How many boys are in the school?
140 boys
200
The graph shows how many sheets of paper a paper-folding machine can fold in a certain number of minutes. What is the constant of proportionality?
150; The machine folds 150 sheets in 1 min.
300
Is the following numbers of flowers proportional? If yes, what would be the equation that relates the number of purple flowers, y, to the number of pink flowers, x?
No
300
Using the graph, what does the point (45,900) mean. 
900 bottles are capped in 45 seconds.
300
Susan needs to buy her cat some litter box sand. At a store, 6 bags of litter sand costs $24.60. How much would Susan spend on 4 bags of litter sand.
16.40
300
What is the constant of proportionality?
y=6.25x
6.25
400
Which graph shows that 2 cookies cost $1.50, 6 cookies cost $4.50 and 8 cookies cost $6.00?
B.
400
What is the constant of proportionality? And what does the constant of proportionality represent in this
graph?
20
It means there are 20 bottles filled in 1 second.
400
Sara walked 4/7 mile in 3/4 hour. How fast did she walk, in miles per hour?
16/20 miles per hour
400
Compare the two companies below and tell me which company is a better deal. You must show work to prove your answer.
AT&T is a better deal, it is $24.50 per month and Verizon is $27 per month.
400
The constant of proportionality is ______ miles per hour. 
490
500
The table shows the number of white and yellow flowers Cara used in 5 different arrangements. What is the equation for the table. 
y=3/2x
500
Which graph has an equation of y=2x?
A.)
500
Elizabeth is making a Risotto recipe that calls for 2/3 cup of Risotto for every 3/4 cup of water. How much water will she need if she uses 1 1/2 cups of Risotto?
1 11/16
500
Dawn used 3.25 cups of flour to make 5 batches of cookies. Steve used 4.7 cups of flour to make 6 batches of cookies. Who used more flour per batch of cookies?
Steve used more
500
What is the constant of proportionality in the following equation?
y=3/4x
3/4