Answer
The slope of a line parallel to the given line is $1$.
Work Step by Step
RECALL:
$\\\\$(i) In the function $f(x) = mx + b$, m=slope and b=y-intercept.
$\\\\$(ii) Parallel lines have the same (equal) slopes.
$\\\\\\$The given function has a slope of $1$.
$\\\\$Parallel lines have the same slope therefore the slope of a line parallel to the given line is also $1$.