Question 672896
when you have a table, just plot give points on Cartesian coordinate system and connect them all by drawing a line which is a parabola if you have a quadratic function

example:

{{{f(x)=x^2-1}}}

{{{x}}}|{{{f(x)}}}

{{{0}}}|{{{-1}}}

{{{1}}}|{{{0}}}

{{{-1}}}|{{{0}}}

{{{2}}}|{{{3}}}

{{{-2}}}|{{{3}}}

{{{3}}}|{{{8}}}

{{{-3}}}|{{{8}}}


{{{drawing(600,600,-10,10,-10,10,grid(1),circle(0,-1,0.2),circle(-1,0,0.2),circle(2,3,0.2),circle(-2,3,0.2),circle(3,8,0.2),circle(-3,8,0.2))}}}

now connect them

{{{drawing(600,600,-10,10,-10,10,grid(1),circle(0,-1,0.2),circle(-1,0,0.2),circle(2,3,0.2),circle(-2,3,0.2),circle(3,8,0.2),circle(-3,8,0.2),graph(600,600,-10,10,-10,10,x^2-1))}}}