Question 1205716




the line{{{ x = 5}}} is vertical line and is perpendicular to the horizontal line {{{y=b}}}

if the line that passing through ({{{4}}},{{{ 1}}}), than {{{b=1}}}

so your line is {{{y=1}}}


{{{ drawing( 600, 600, -10, 10, -10, 10, 
circle(4,1,.12), locate(4,1,p(4,1)),
blue(line(5,-10,5,10)),
graph( 600, 600, -10, 10, -10, 10, 1,1)) }}}