Answer:
9x -18
Explanation:
f(x) = 1/9 x + 2
Let y = 1/9x +2
Exchange x and y
x = 1/9 y +2
Solve for y
Subtract 2 from each side
x-2 = 1/9 y +2-2
x-2 = 1/9 y
Multiply each side by 9
9(x-2) = 1/9 y *9
9x -18 = y
The inverse is 9x -18
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