You can
put this solution on YOUR website! First make a table
x y
-5.00000 -9.50000
-4.00000 -5.00000
-3.00000 -1.50000
-2.00000 1.00000
-1.00000 2.50000
0.00000 3.00000
1.00000 2.50000
2.00000 1.00000
3.00000 -1.50000
4.00000 -5.00000
5.00000 -9.50000
Now plot each point and draw a parabola through them like this:
graph of 