Write the equation of the line that is perpendicular to the x-axis and passes through the point (3, 2).

Hello!
Any (straight) line perpendicular to the x-axis has the equation of the form x = a, where a is a constant. In other words, for all points of such a line the x-coordinate is the same (and is equal to a ).
Therefore if the line must go through the point (3, 2), whose x-coordinate is 3, then its equation is x = 3.