Is it proportional? / Unit rate
Proportional tables
Proportional graph
Proportional equations
Percent proportion
100
Is it proportional?
1/3=9/3
No
100
A table is proportional if...?
A proportion can be made with any two ratios
OR
the unit rate is the same for all ratios
100
How do we know a graph is proportional?
Line is straight, and it starts at 0
100
What is the general form for a proportional equation?
y = kx
100
What is 40% of 300?
120
200
The song "Rap God" by Eminem has 1560 words in about 6 minutes. What is the unit rate?
260 words per minute
200
What is k for the table?
k = 0.69
200
What is the unit rate for the graph?
About 8.33
200
Write an equation for the following ratios:
2 books cost $8.40
5 books cost $21.00
y = 4.20x
200
16 is 50% of what number?
32
300
A box contains 12.5 pounds of pencils, which will be shared amongst 50 students. How many pounds of pencils will each student receive?
1/4
300
What is the constant of proportionality?
1.5 or
3/2
300
What is the constant of proportionality?
3
300
Terry charges $42 for washing cars for 2.8 hours. What would be the equation for this proportional relationship, where y represents money and x represents hours?
y=15x
300
An eagle ate 6 pounds of food, and 66.67% of it is fish. How much food would be fish if the eagle eats 12 pounds of food?
8
400
A firefighter ladder rises up 3.5 feet every 10 seconds. How much would it rise in 1 minute?
21 feet
400
What is the unit rate for this table?
4
400
Write an equation for this graph
y=2/5x
400
What is the equation for this table?
w=16.5m
400
A TV store is selling a 24'' flatscreen for $960. The TV comes with a discount of 12%. How much will you pay for the TV?
$844.80
500
Micah bought 3 books for $22.95.
How many books can Micah buy for $137.70?
18 books
500
Figure out the missing values
20 and 720
500
What point represents how much Amelia makes per hour?
(1,8)
500
What equation is modeled by this graph?
y=7/4x
500
A wall needs 1.75 gallons of paint to cover it entirely. Raquel is going to paint her entire living room, and needs to buy paint. It costs $24.25 per gallon. How much will she pay?
$169.75