Question 250924
Parallel lines have identical slopes.
{{{m=5}}}
Use the point-slope form of a line with point (xp, yp) and slope m:
{{{ y-yp=m(x-xp)}}}
{{{ y-(-1)=5(x-2)}}}
{{{ y+1=5x-10}}}
{{{ y=5x-11
}}}

{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),circle( 2, -1, .2 ), graph( 300, 300, -5, 5, -5, 5, 5x-11, 5x)) }}}