Let $f(x) = m x +C$, where $m$ and $C$ are real numbers. Then the expression can be written in the form $Ah + Bx + D$, where $A$, $B$, and $D$ are constants. (Note: It's possible for one or more of these constants to be 0.) Find the constants.

$A =$

$B =$

$D =$

Use your answer from above to find $f'(x)$.

$f'(x) =$

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