F(x) varies inversely with x and f(x) = –10 when x = 20. What is the inverse variation equation?

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Answer 1 · 2017-01-05T21:13:09

#F(x)=-200/x#

#F(x)" "#varies inversely with #x#

#=>F(x) " "alpha" "1/x#

ie.#" " F(x)=k/x" "#for some constant #k#

use the given data to find #k#

#-10=k/20#

#=>k=-200#

#:.F(x)=-200/x#