To determine if the given relation is a function using the vertical line test, we look for whether any vertical line drawn on the graph intersects the plotted line at more than one point. If a vertical line intersects the line at more than one point, the relation is not a function.
In this case, the line passes through the points (0, -3) and (3, 0) and has an upward slant, meaning it is a straight line. A straight line will only be crossed by a vertical line at one point at a time.
Given that there is no instance where a vertical line intersects the line at more than one point, the relation passes the vertical line test.
Therefore, the correct response is:
Yes, the given relation is a function.