Answer: x=4
Step-by-step explanation: The line x=0 is basically the y- axis, so any line parallel with that will have the form x=n. From the point (4,3), we know that it intersects with an x-value of 4 and a y- value of 3. Since it is a vertical line, it must be the line x=4, because the line intersects the x-value of 4. The y-value doesn't matter because a vertical line already intersects all y-values.
