Answer
See graph
Work Step by Step
$x-y=3$
$y=x-3$
To find the x-intercept, substitute 0 for y.
$0=x-3$
$x=3$
$(3,0)$
To find the y-intercept, substitute 0 for x.
$y=0-3$
$y=-3$
$(0,-3)$
Plot these points and connect with a straightedge.
$f(x)=x-3$