Answer
$\color{blue}{\text{x-intercept}}$
Work Step by Step
RECALL:
(1) An x-intercept is a point were a graph touches or crosses the x-axis. Its coordinates are $(a, 0)$.
(2) A y-intercept is a point were a graph touches or crosses the y-axis. Its coordinates are $(0, b)$.
This means that the point $(-3, 0)$ could be an x-intercept but not a y-intercept of a graph.
Thus, the missing expression in the given statement is:
$\color{blue}{\text{x-intercept}}$
