If the Function $f ( x ) = \frac { x + 9 } { 5 }$

question 177

Multiple Choice

If the function $f ( x ) = \frac { x + 9 } { 5 }$ is one-to-one, find its inverse.

• A) \(f ^ { - 1 } ( x ) = \frac { 5 } { x + 9 }\)
• B) \(f ^ { - 1 } ( x ) = 5 x - 9\)
• C) \(f ^ { - 1 } ( x ) = 5 x + 9\)
• D) not one-to-one

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