Question 1089929
<pre>
Make a table of values from -10 to +10 for x,
and solve for y.  I'll do one of them for you, say when x=-7

{{{x^2=20y}}}
{{{(-7)^2=20y}}}
{{{49=20y}}}
{{{49/20=y}}}
{{{2.45=y}}}


  x | y
-10 | 5
 -9 | 4.05
 -8 | 3.2
 -7 | 2.45
 -6 | 1.8
 -5 | 1.25
 -4 | 0.8
 -3 | 0.45
 -2 | 0.2
 -1 | 0.05
  0 | 0
  1 | 0.05
  2 | 0.2
  3 | 0.45
  4 | 0.8
  5 | 1.25
  6 | 1.8
  7 | 2.45
  8 | 3.2
  9 | 4.05
 10 | 5 

Then plot them:

{{{drawing(1150, 400, -11,12,-3,5,
graph(1150, 400, -11,12,-3,5),
circle(-10,5,.05), locate(-10,5,"(-10,5)"),
circle(-9,4.05,.05), locate(-9,4.05,"(-9,4.05)"),
circle(-8,3.2,.05), locate(-8,3.2,"(-8,3.2)"),
circle(-7,2.45,.05), locate(-7,2.45,"(-7,2.45)"),
circle(-6,1.8,.05), locate(-6,1.8,"(-6,1.8)"),
circle(-5,1.25,.05), locate(-5,1.25,"(-5,1.25)"),
circle(-4,0.8,.05), locate(-4,0.8,"(-4,0.8)"),
circle(-3,0.45,.05), locate(-3,0.45,"(-3,0.45)"),
circle(-2,0.2,.05), locate(-2,0.2,"(-2,0.2)"),
circle(-1,0.05,.05), locate(-1,0.05,"(-1,0.05)"),
circle(0,0,.05), locate(0,0,"(0,0)"),
circle(1,0.05,.05), locate(1,0.05,"(1,0.05)"),
circle(2,0.2,.05), locate(2,0.2,"(2,0.2)"),
circle(3,0.45,.05), locate(3,0.45,"(3,0.45)"),
circle(4,0.8,.05), locate(4,0.8,"(4,0.8)"),
circle(5,1.25,.05), locate(5,1.25,"(5,1.25)"),
circle(6,1.8,.05), locate(6,1.8,"(6,1.8)"),
circle(7,2.45,.05), locate(7,2.45,"(7,2.45)"),
circle(8,3.2,.05), locate(8,3.2,"(8,3.2)"),
circle(9,4.05,.05), locate(9,4.05,"(9,4.05)"),
circle(10,5,.05), locate(10,5,"(10,5)") )}}}

Then connect them with a smooth curve:

{{{drawing(1150, 400, -11,12,-3,5,
graph(1150, 400, -11,12,-3,5,x^2/20),
circle(-10,5,.05), locate(-10,5,"(-10,5)"),
circle(-9,4.05,.05), locate(-9,4.05,"(-9,4.05)"),
circle(-8,3.2,.05), locate(-8,3.2,"(-8,3.2)"),
circle(-7,2.45,.05), locate(-7,2.45,"(-7,2.45)"),
circle(-6,1.8,.05), locate(-6,1.8,"(-6,1.8)"),
circle(-5,1.25,.05), locate(-5,1.25,"(-5,1.25)"),
circle(-4,0.8,.05), locate(-4,0.8,"(-4,0.8)"),
circle(-3,0.45,.05), locate(-3,0.45,"(-3,0.45)"),
circle(-2,0.2,.05), locate(-2,0.2,"(-2,0.2)"),
circle(-1,0.05,.05), locate(-1,0.05,"(-1,0.05)"),
circle(0,0,.05), locate(0,0,"(0,0)"),
circle(1,0.05,.05), locate(1,0.05,"(1,0.05)"),
circle(2,0.2,.05), locate(2,0.2,"(2,0.2)"),
circle(3,0.45,.05), locate(3,0.45,"(3,0.45)"),
circle(4,0.8,.05), locate(4,0.8,"(4,0.8)"),
circle(5,1.25,.05), locate(5,1.25,"(5,1.25)"),
circle(6,1.8,.05), locate(6,1.8,"(6,1.8)"),
circle(7,2.45,.05), locate(7,2.45,"(7,2.45)"),
circle(8,3.2,.05), locate(8,3.2,"(8,3.2)"),
circle(9,4.05,.05), locate(9,4.05,"(9,4.05)"),
circle(10,5,.05), locate(10,5,"(10,5)") )}}}

Edwin</pre>