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Mathematics 19 Online
OpenStudy (jessicawade):

math help! inverse function

OpenStudy (jessicawade):

Suppose that y varies inversely with x. Write a function that models the inverse function. x = 25 when y = 5

OpenStudy (freckles):

y varies inversely with x means y=k/x

OpenStudy (freckles):

You can find the constant k using the point they gave (x=25,y=5)

OpenStudy (freckles):

enter values into equation and solve for k

OpenStudy (jessicawade):

ok

OpenStudy (jessicawade):

125x

OpenStudy (freckles):

what is k? you solved 5=k/25 yet for k?

OpenStudy (freckles):

oh you mean k=125 right?

OpenStudy (freckles):

so your equation is y=125/x

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