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2 August, 10:15

If y various directly with x, write an equation for the direct variations. The find each value.

1.) If y = - 4 when x = 10, find y when x = 5

2.) If y = 12 When x = - 15, find y when x = 2

3.) Find x when y = 18, If y = 9 when x = 8

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Answers (1)
  1. 2 August, 11:45
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    The equation is y=kx

    U have to substitute the numbers and once u get the k

    You have to substitute the other numbers to get your answer

    Forexample - question 1

    Y=kx

    Substiute the numbers

    -4=k (10)

    -2/5=k

    Substitute 5 for x

    Y=kx

    Y=-2/5 (5)

    Y=-2
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