Answer
$x$-intercept: $(4, 0)$
no $y$-intercept
Refer to the graph below.
Work Step by Step
Recall:
The graph of a line in the form $x=h$ is a vertical line whose $x$-intercept is $(h, 0)$.
The line has no $y$-intercept unless $x=0$.
Thus, the intercept of the graph of $x=4$ is at $(4, 0)$.
The graph has no $y-$intercept.