Determine Whether the Function Is One-To-One $$f ( x ) = 5 - 4 x$$

question 46

Multiple Choice

Determine whether the function is one-to-one. If it is one-to-one find an equation or a set of ordered pairs that defines
the inverse function of the given function.
- $$f ( x ) = 5 - 4 x$$

• A) one-to-one; \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 5 - 4 \mathrm { x } }\)
• B) one-to-one; \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { - \mathrm { x } + 5 } { 4 }\)
• C) one-to-one; \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } - 5 } { 4 }\)
• D) not one-to-one

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