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gbprulesmile
I believe that the answer to that question is B. Because it is the inverse of the equation, everything will be postitive instead of negative.
Hope this helps!
choixongdong
f(x) = 1/9 x - 2
so inverse
x = 1/9 y - 2
1/9 y = x + 2
      y = 9x + 18

function
f-1(x) = 9x + 18

Answer is A . first one
f-1(x) = 9x + 18

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