Question

Can somebody explain to me, how to graph a parabola?

Answer 1

http://www.youtube.com/watch?v=9ltJFO8cEu4

Answer 2

http://www.youtube.com/watch?v=siEoGGSmD-0

Answer 3

Draw a u

Answer 4

a necklace hanging down a lady's neck...

Answer 5

Graph this parabola x^2-9
x^2-9=(x+3)(x-3)
So now we know that the zeroes are 3,-3

Next, we find the vertx
-b/2a= 0
0^2-9=-9
vertex(0,-9)
That should be enough info to graph the parabola