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تغیرات

دسویں جماعت · ریاضی · 5 سوالات

نام: ____________________   تاریخ: ____________

  1. If y varies directly with x and y = 6 when x = 2, what is y when x = 5?

    • A 15
    • B 12
    • C 10
    • D 30

  2. If y is inversely proportional to x and y = 4 when x = 3, what is y when x = 6?

    • A 12
    • B 1
    • C 8
    • D 2

  3. In y = k x, k is called:

    • A Constant of variation
    • B Slope only
    • C Exponent
    • D Variable

  4. If a is proportional to b2 and a = 8 when b = 2, what is a when b = 3?

    • A 27
    • B 18
    • C 24
    • D 12

  5. Speed and time for a fixed distance are in:

    • A Direct variation
    • B Joint variation
    • C Inverse variation
    • D No variation

جوابی کلید

1. A, 2. D, 3. A, 4. B, 5. C

  1. y = k x with k = 3, so y = 15.

  2. xy = 12 is constant, so y = 12 / 6 = 2.

  3. k is the constant of variation.

  4. a = k b2 with k = 2, so a = 2 x 9 = 18.

  5. Doubling the speed halves the time.