Answer
no $x$-intercept;
$y$-intercept is at $(0, 3)$
Refer to the graph below.
Work Step by Step
Recall:
The graph of a line whose equation is in the form $y=k$ is a horizontal line whose $y$-intercept is $(0, k)$. The line has no $x$-intercept unless the equation of the line is $y=0$.
Thus, the $y$-intercept of the graph of $y=3$ is at $(0, 3)$.
The graph has no $x-$intercept.
