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7 Pre Alg mid unit 1 review

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  • This distance traveled is proportional to time. What is k?
    k = 45 or 45 mi/hr
  • Is this relationship proportional? Why or why not?
    No. There is no constant
  • Proportional or Non Proportional?
    Proportional
  • This data is proportional. What is the equation of the line?
    y = 6x
  • Is this relationship proportional? Why or why not?
    No-it does not cross the origin
  • 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 the data proportional? If yes, what does k =
    Yes - it is straight and through the origin; k = 1000
  • Is this table proportional?
    yes
  • Is this table proportional?
    yes
  • Is this relationship proportional? Why or why not?
    yes- it is a straight line and crosses through the origin
  • Is this table proportional?
    yes
  • What is the meaning of the unit rate in context?
    10 cm/min
  • P or NP
    Proportional
  • What does the point (12,4) represent?
    after 12 minutes, 4 pages had been read
  • Is this data proportional? If yes, write an equation using the constant of proportionality.
    y = 18.5x
  • Is this table proportional?
    no
  • Proportional or NonProportional?
    NonProportional
  • 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
  • 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
  • Is this proportional? Why or why not?
    yes-straight line through the origin
  • Is this table proportional?
    yes
  • 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
  • Is the data proportional? If yes, what is the value of k?
    Proportional, k = -5/2 or -2.5
  • How is a proportion formed?
    2 or more equivalent ratios
  • Is this table proportional?
    No
  • Is the data Proportional or NonProportional? Explain.
    NP - doesn't pass through the origin
  • Fill in the blanks in the table
    18, 7, 9
  • Is this data proportional? If yes, what is the value of k?
    Yes, k=1.5
  • Is this table proportional?
    No
  • What is the equation for this relationship?
    y=2x
  • How do you write the equation of a proportional relationship?
    y = kx
  • Is this table proportional?
    yes
  • Is this relationship proportional? Why or why not?
    Yes. Constant is times 2
  • How do you know the data is proportional?
    k = 3 for all ratios of y/x
  • What equation represents this relationship (LABEL each part)?
    y gallons water=2x minutes showered
  • 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
  • Is this table proportional?
    yes
  • What is the constant of proportionality in this relationship (LABEL YOUR ANSWER)?
    2 gallons of water per minute
  • How many lines represent a proportional relationship?
    1
  • Is this table proportional?
    yes
  • 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
  • How is a unit rate expressed as a ratio with a _____________ of _______
    Ratio with a denominator of 1
  • What is the meaning of the unit rate in context?
    3 ft/min
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