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How is a proportion formed?
2 or more equivalent ratios
Is the data Proportional or NonProportional? Explain.
NP - doesn't pass through the origin
Explain 2 ways you can know this data is NonProportional.
Ratios of y/x are not equal and it does not pass through the origin
Is the data proportional? If yes, what is the value of k?
Proportional, k = -5/2 or -2.5
Proportional or NonProportional?
NonProportional
How many lines represent a proportional relationship?
1
Proportional or Non Proportional?
Proportional
How do you write the equation of a proportional relationship?
y = kx
What is the better deal: 13 lb bag for $25.50 or a 27 lb bag for $32.25. Which bag is the better buy?
27 lb bag
Kevin put 5 gallons of gas in his car and it cost him $10.50. How much did each gallon of gas cost that Kevin pumped into his car?
$2.10 per gallon
How is a unit rate expressed as a ratio with a _____________ of _______
Ratio with a denominator of 1
Is this data proportional? If yes, write an equation using the constant of proportionality.
y = 18.5x
Jess walked 6.5 miles in 2 hours. If she continues at this rate, how many miles can she walk in 4.5 hours? Round to the nearest whole number
About 15 miles
Is this data proportional? If yes, what is the value of k?
Yes, k=1.5
P or NP
Proportional
Is the data proportional? If yes, what does k =
Yes - it is straight and through the origin; k = 1000
What is the meaning of the unit rate in context?
10 cm/min
How do you know the data is proportional?
k = 3 for all ratios of y/x
What is the meaning of the unit rate in context?
3 ft/min
This distance traveled is proportional to time. What is k?
k = 45 or 45 mi/hr
This data is proportional. What is the equation of the line?
y = 6x
What does the point (12,4) represent?
after 12 minutes, 4 pages had been read
What is the constant of proportionality? Then. use the constant to write the equation (label its parts)
1/3 or 0.33333333; y pages read=0.3x minutes
Is this proportional? Why or why not?
yes-straight line through the origin
What is the equation for this proportional relationship between the number of children at a party and the number of balloons a clown gives out?
y number balloons= 3x number of children
Fill in the blanks in the table
18, 7, 9
What equation represents this relationship (LABEL each part)?
y gallons water=2x minutes showered
What is the constant of proportionality in this relationship (LABEL YOUR ANSWER)?
2 gallons of water per minute
Is this relationship proportional? Why or why not?
yes- it is a straight line and crosses through the origin
Is this relationship proportional? Why or why not?
No-it does not cross the origin
Is this relationship proportional? Why or why not?
No. There is no constant
What is the equation for this relationship?
y=2x
Is this relationship proportional? Why or why not?
Yes. Constant is times 2
Is this table proportional?
yes
Is this table proportional?
yes
Is this table proportional?
no
Is this table proportional?
yes
Is this table proportional?
yes
Is this table proportional?
yes
Is this table proportional?
yes
Is this table proportional?
No
Is this table proportional?
yes
Is this table proportional?
No
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