Question 911780
{{{y=-x^2}}}

make a table:

{{{x}}}_|{{{y}}}

{{{-2}}}|{{{-4}}} .......{{{y=-(-2)^2=-4}}}

{{{-1}}}|{{{-1}}} .......{{{y=-(-1)^2=-1}}}

{{{0}}}_|{{{0}}} .......{{{y=-(-1)^2=-1}}}

{{{1}}}_|{{{-1}}} .......{{{y=-(1)^2=-1}}}

{{{2}}}_|{{{-4}}} .......{{{y=-(2)^2=-4}}}

plot points and draw a graph


{{{ drawing( 600, 600, -10, 10, -10, 10,circle(2,-4,.1), circle(1,-1,.1), circle(0,0,.1), circle(-1,-1,.1), circle(-2,-4,.1), graph( 600, 600, -10, 10, -10, 10, -x^2)) }}} 


domain:  {{{R}}}  (all real numbers)


range:{ {{{y}}} element {{{R}}} : {{{y<=0}}} }  (all non-positive real numbers)