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Math Help - y varies inversely with x. Find the inverse variation equation if x = 12 when y = -18

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    y varies inversely with x. Find the inverse variation equation if x = 12 when y = -18

    Need help with this problem: y varies inversely with x. Find the inverse variation equation if x = 12 when y = -18 and what formula to use to get the correct answer. Thank you in advance
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    Re: y varies inversely with x. Find the inverse variation equation if x = 12 when y =

    I'm very surprised that you would be given a problem like that and not even be told what "inverse variation" means! If x and y have an "inverse variation" then y= \frac{k}{x} which is the same as xy= k. Knowing that "x= 12 when y= -18" lets you calculate k.
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    Re: y varies inversely with x. Find the inverse variation equation if x = 12 when y =

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