Question

Hey who wants a medal?? Help me show my work with this!! Please?? I need to learn this stuff.

Answer 1

Suppose a parabola has vertex (–4, 7) and also passes through the point (–3, 8). Write the equation of the parabola in vertex form.

Answer 2

@UsArmy3947

Answer 3

@Nutcase482

Answer 4

Do you know the vertex form in the first place

Answer 5

Vertex form is: a(x-h)^2+k

Answer 6

I don't understand this stuff from the very beginning though.

Answer 7

http://www.youtube.com/watch?v=V-QVQ7YhQNE

Answer 8

I cant use youtube.

Answer 9

The goal is to get the right y value when you put in the x value for the vertex.
y=a(x-h)^2+k.
Let's say the vertex is (1,1)
Then the vertex equation would be y=a(x-1)^2+1 because when you put x=1 into the equation the first part neatly cancels and you are left with y=1.

Try and do this with your equation.

Answer 10

hmmm do you even know what a parabola is?

Answer 11

Yeah..

Answer 12

There's just too much to learn with this stuff.. Its stupid.

Answer 13

http://www.mathwarehouse.com/geometry/parabola/images/standard-vertex-forms.png well, notice the equation of a parabola in standard form, and in vertex form

you'rea sked to use the "vertex form" for this matter

how would it look like given the vertex is at ( -4, 7) ?

Answer 14

Well it would be in a U shape..

Answer 15

hmmm ... I meant how would the equation look like