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If f(x)=1/9x-2, what is f^-1(x)
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14 votes
If f(x)=1/9x-2, what is f^-1(x)

User Terry Jan Reedy
by
8.2k points

1 Answer

8 votes

Answer:

the inverse is 9x + 18

Explanation:

switch 'x' with 'y'

y = 1/9x - 2

x = 1/9y - 2

solve for y now, start with multiplying each side by 9

9x = y - 18

y = 9x + 18

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

User Chivorotkiv
by
8.7k points
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