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HOW MUCH DOES IT VARY?

Quiz by Rosalyn Baring

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21 questions
Show answers
  • Q1

    _________ proportionality wherein one quantity directly varies with respect to a change in another quantity.

    Question Image
    Users enter free text
    Type an Answer
    10s
  • Q2

    Select the correct one for direct variation.

    Question Image

    y = kx

    k = \frac{x}{y}

    yx = k

    y = \frac{k}{x}

    5s
  • Q3

    Direct variation is not a linear relationship hence, the graph will be a straight line.

    Question Image
    false
    true
    True or False
    5s
  • Q4

    The graph of a direct variation is a rectangular hyperbola.

    Question Image
    false
    true
    True or False
    5s
  • Q5

    Two quantities are said to follow a direct variation if one increases and the other decreases by the same factor.

    Question Image
    false
    true
    True or False
    5s
  • Q6

    C = πd. This formula an example of a direct variation.

    Question Image
    true
    false
    True or False
    5s
  • Q7

    The quantity of Iron boxes made is directly proportional to the number of iron blocks. The number of iron blocks needed for 40 boxes is 160. How many iron blocks are needed for a box?

    Question Image

    Thus 2 iron blocks are needed for a box.

    Thus 4 iron blocks are needed for a box.

    Thus 20 iron blocks are needed for a box.

    Thus 8 iron blocks are needed for a box.

    20s
  • Q8

    Let us assume that y varies directly with x, and y = 30 when x = 6. What is the value of y when x = 100?

    Therefore the value of y when x = 100 is 5000.

    Therefore the value of y when x = 100 is 500.

    Therefore the value of y when x = 100 is 500.

    Therefore the value of y when x = 100 is 50.

    20s
  • Q9

    If x = 10 and y = 20 follow a direct variation then find the constant of proportionality.

    2

    5

    \frac{2}{5}

    \frac{1}{2}

    20s
  • Q10

    Let x and y be in direct variation, x = 6 and y = 21. Then find the direct variation equation.

    The direct variation equation is y = \frac{5}{2}

    The direct variation equation is y = 3

    The direct variation equation is y = \frac{7}{2}

    The direct variation equation is y = \frac{3}{2}

    20s
  • Q11

    Which of the given graphs is a direct variation?

    Question Image

    C

    D

    B

    A

    10s
  • Q12

    Given a direct variation where y=2x. What will be the coefficient of b in the formula, y=mx+b?

    \frac{1}{2}

    1

    0

    2

    10s
  • Q13
    10s
  • Q14

    If the number of books is y, and cost of books is x, what would be the constant ?

    Question Image

    1/x

    y/x

    1/y

    x/y

    10s
  • Q15

    if 1 book costs 30 Rs, how much will it cost for 2 books?

    Question Image

    44230

    50

    44226

    60

    10s

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