Finding the Linear equation.

Hello guys, i hv doubt in this question:

"1-Mark the point Q, such that the line through P (1, -2) and Q is perpendicular to the x axis (the horizontal axis) so that the point Q to point P is equidistant from the axis x. Find the equation of the line."


If the line be perpendicular of the X axis, so will be parallel of the Y axis. A line parallel to the axis Y can be a function?
OBS: Sorry about my bad technical English.

Quote:

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A line parallel to the axis Y can be a function?

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no, but vertical lines have an equation of the form x = k , where k is a constant

the graph would be some thing like this?
Attachment 24835

yes ... now what is the equation of the vertical line that passes thru points P and Q ?

x = 1 ??