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9 September, 15:54

If y = 3 when x = 15, find the value of y when x = 75

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Answers (2)
  1. 9 September, 18:37
    0
    y = 15

    Step-by-step explanation:

    Let x vary directly to y

    x ∝ y; x=ky where 'k' is the propotionality constant

    k = x/y; k = 15/3

    k=5; But x=75

    ∴ 5 = 75/y; 5y = 75

    y = 75/5

    y = 15
  2. 9 September, 19:03
    0
    Answer: Y=15
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