Question 679850
The equation {{{ x = 4 }}} is a vertical line through (4,0)
Any line perpendicular to this line will be parallel to
the x-axis, and will have an equation that looks like
{{{ y = c }}}
If it goes through ( -15,90 ), the equation is
{{{ y = 90 }}}
( x can be anything, and it doesn't affect the equation )