There is no y as part of the equation. It is a vertical line through 4 on the x axis. Every point on this line has an x coordinate of 4. Recall that all vertical lines have undefined slopes. I picked 4 because it is the x coordinate of the given point (4,7).
Answer:
x=4
Step-by-step explanation:
A vertical line has an undefined slope
Vertical lines are of the form
x=
This passes through the point
(4,7) so it must go through x=4
x=4
