LET'S GO
UP AND DOWN
I AM OR I AM NOT
WITH EQUAL SIGN
RATE OR CONSTANT
Y=KX
10
The ratio of boys to girls is 3 to 2. If there are 12 boys, how many girls are there?
8 girls
10
What does the point (5, 225) represent in this situation?
$225 in 5 hours.
10
Is this graph proportional?
yes
10
Is this equation proportional?
y=-9x
If so, what is k?
Yes! k=-9
10
What is the unit rate/constant of proportionality?
$1.25 per lb of bananas.
10
What does K stand for in proportional equations?
K = constant
15
Mary has saved $17 in the past 3 weeks. At this rate, how much will she save in 15 weeks?
$85
15
What does the point (30,45) represent?
30 square feet of carpet for $45.
15
Is this graph proportional? Explain.
No, because it does not go through the origin.
15
Is this equation proportional?
y=4+3x
If so, what is k?
No
15
What is the constant of proportionality?
$3 per lb.
15
A proportional equation is always in what form? (What variables?)
y = kx
30
The ratio of the cost of a tennis racket to tennis balls is 18:1. If a can of balls cost $5, what is the cost of the racket?
$90
30
What is the unit rate?
The unit rate is $15 a month.
30
Is this a table of a proportional relationship? 
Yes.
30
Is this equation proportional?
y=1/2x
If so, what is k?
Yes. k=1/2
30
Find the unit rate/constant of proportionality
16 pieces of candy per box.
30
What is the proportional equation for this relationship?
y =38x
45
Curtis School has 1,575 students. The student to teacher ratio is 15 to 1. How many teachers are at Curtis School?
105 Teachers
45
What is the constant of proportionality?
16 cookies per cup of flour
45
Is this a table of a proportional relationship?
No.
45
Is this equation proportional?
8x+2=y
If so, what is k?
No
45
Find the unit rate/constant of proportionality
1.2 miles per hour.
45
What is the proportional equation for this relationship?
y= 1/3x
60
In a public opinion poll, 624 people from a sample of 1,100 indicated they would vote for a specific candidate. How many votes can the candidate expect to receive from a population of 40,000?
22,690 votes
60
What does the point (10,5) represent?
10 jam jars per 5 cups of sugar
60
Is this a table of a proportional relationship?
No.
60
Is this equation proportional?
3y=8x
If so, what is k?
Yes. k=8/3
60
Find the unit rate of cups of broccoli per lbs of beef.
1.5 cups of broccoli per lbs of beef.
60
What is the equation for this proportional relationship?
y=1/6x