Question 978001

line passing through ({{{1}}},{{{9}}}) and perpendicular to {{{2x+7y=1}}}

in slope-intercept form: 

{{{7y=-2x+1}}}

{{{y=-(2/7)x+1/7}}}

*[invoke equation_parallel_or_perpendicular "perpendicular", -"2/7", "1/7", 1, 9]