Question 941689
plotting point:

({{{-1}}},{{{1}}}) => {{{x=-1}}} and {{{y=1}}}

first dray Cartesian coordinate system

{{{ graph( 600, 600, -5, 5, -5, 5, 0) }}}

then, go to {{{y=1}}}, place the ruler parallel to x-axis and draw a line

{{{drawing( 600, 600, -5, 5, -5, 5,green(line(-3,1,0,1)), graph( 600, 600, -5, 5, -5, 5, 0)) }}}

then do same from {{{x=-1}}}, draw a line parallel to {{{y-axis}}}

{{{drawing( 600, 600, -5, 5, -5, 5,green(line(-3,1,0,1)),green(line(-1,0,-1,3)), graph( 600, 600, -5, 5, -5, 5, 0)) }}}

your point ({{{-1}}},{{{1}}}) is where these lines intersect

{{{drawing( 600, 600, -5, 5, -5, 5,green(line(-3,1,0,1)),green(line(-1,0,-1,3)), circle(-1,1,.1),locate(-1,1,p(-1,1)), graph( 600, 600, -5, 5, -5, 5, 0)) }}}