PLEASE HELP I WILL GIVE BRAINLY If y varies directly with x and y = 56 when x = 8, find y if x = 4. First, fin

Question

PLEASE HELP I WILL GIVE BRAINLY

If y varies directly with x and
y = 56 when x = 8, find y if x = 4.
First, find the direct variation equation.
y = [ ? ]x

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Euphemia 4 years 2021-08-03T14:40:27+00:00 1 Answers 17 views 0

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  1. Orla
    0
    2021-08-03T14:41:35+00:00
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    Answer:

    y = 7x and y = 28

    Step-by-step explanation:

    Given y varies directly with x then the equation relating them is

    y = kx ← k is the constant of variation

    To find k use the condition y = 56 when x = 8 , then

    56 = 8k ( divide both sides by 8 )

    7 = k

    y = 7x ← equation of variation

    When x = 4

    y = 7 × 4 = 28

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