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.

Re: Finding the Linear equation.

Quote:

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

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

1 Attachment(s)

Re: Finding the Linear equation.

the graph would be some thing like this?

Attachment 24835

Re: Finding the Linear equation.

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

Re: Finding the Linear equation.