Answer
$f(x) = 1/3x-17/3$
Work Step by Step
We know that the line is parallel to the given line, so their slopes are the same. Thus, we know that the slope must be 1/3. Next, we use the second point to find:
$y = 1/3x-17/3$
However, we were asked to write this in function notation, so we replace y with f(x).
$f(x) = 1/3x-17/3$