Because you have only given the point at which a line crosses the "x" axis. Since x = 4, we can draw it only vertically through (4,0).
Because X (which in this case is always 4) is the value of the horizontal axis so the only value that can change is Y, the verticle axis.
A vertical line!
A horizontal line is perpendicular to a vertical line.
It is a line that is vertical from a line segment or a intersecting line .
A horizontal line is a line perpendicular to the vertical.
A vertical line has an undefined slope. For the line to be parallel to a vertical line, the slopes would have to be the same. Therefore, the line parallel to a vertical line also has an undefined slope.
all vertical lines are parallel to waht type of line?
x = 4 is the set of all points where the x coordinate = 4 On a number line, it's easy to graph. You simply place a dot on the number 4. When you extend that number line along the y axis, the dot extends, as well, into a line.
the slope of a vertical line is 0.