Draw a few vertical lines and see if they are parallel to the y-axis.
Sometimes
Practice makes perfect
A vertical line can be modeled as x=a, where a is any arbitrary number. If we draw a couple of vertical lines we can easily see that each of them is parallel to the y-axis.
However, what about when the vertical line has the equation x=0?
When the vertical line is the same line as the y-axis, they are no longer distinct; they are the same line. They will intersect an infinite number of times. Therefore, the answer is sometimes.
