Pre-Algebra

If y varies directly with x, find the constant of variation with x = 4 and y = -24

If y varies inversely with x, find the constant of variation with x=5 and y = 10

If y varies directly with x, and y = 35 when x = 5 , find x when y = -7

If y varies directly with x, and y = -12 when x = 6, find x when y = -4

If y varies inversely with x, and y = 8 when x = 10 , find x when y = 4

If y varies inversely with x, and y = -5 when x = 20, find x when y = -4

I need the answer to these very, very, badlyyyyy!!!

There were 6 rows of these I completed the first rows, this a row, and I'm currently working on the last row.

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  1. direct: y = kx, so k = y/x
    inverse: xy = k

    If y varies directly with x, find the constant of variation with x = 4 and y = -24
    k = y/x = -24/4 = -6

    If y varies inversely with x, find the constant of variation with x=5 and y = 10
    k = xy = 5*10 = 50

    and do the others in like wise.

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  2. PL?o<l

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