Math

Find the constant of variation, K,for y = -8 varies directly when x = 12.

Write an inverse variation to model the situation and answer the question. Two rectangular fields have the same area. One measures 75yd by 60yd. If the other has a length of 75yd, what is its width?

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  1. we know that y=kx, so use that with the known values of x and y:

    -8 = k*12
    k = -2/3

    The area is Width*Length. So,
    WL=k
    That means you want W such that
    75W = 75*60
    W=60
    Huh? If the length of both fields is the same, where's the difficulty? I suspect a typo

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  2. ^^^
    think they got a bit confused. variation is just y÷x, or in this case (-8)÷12=-2/3

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  3. oops nvm, i read it wrong and didn't realize there were two questions

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  4. K= -2/3
    -8/12=-2/3
    Y=(-2/3)x

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