Question 1087361
the equation of line:

{{{y=mx+b}}} where {{{m}}} is a slope and {{{b}}} is y-intercept

if passing through ({{{1}}},{{{2}}}) and ({{{1}}},{{{-2}}}), use these points to find {{{m}}} and {{{b}}}

first find {{{m}}}

*[invoke slope 1, 2, 1, -2]

since the slope of a {{{vertical}}} line is {{{undefined}}}, your line is a {{{vertical}}} line  {{{x=1}}}

{{{drawing( 600, 600, -10, 10, -10, 10,  
blue(line(1,10,1,-10)), circle(1,2,.12),circle(1,-2,.12),
locate(1,2,p(1,2)),locate(1,-2,p(1,-2)),
graph( 600, 600, -10, 10, -10, 10, 0)) }}}