For y = x2 + 6x − 16,
Determine if the parabola opens up or down.
State if the vertex will be a maximum or minimum.
Find the vertex.
Find the x-intercepts.
Describe the graph of the equation.

Question

For y = x2 + 6x − 16,
Determine if the parabola opens up or down.
State if the vertex will be a maximum or minimum.
Find the vertex.
Find the x-intercepts.
Describe the graph of the equation.

e.mccormick · Answer

How far did you get with all this?

anonymous · Answer

the beggining

e.mccormick · Answer

So what part is giving you trouble?

anonymous · Answer

the first part about the parabola

e.mccormick · Answer

Well, that equation is the formula of a parabola.  If it was just $x^2$ it would be at the orgin and up.  But that one has been moved, so you have to solve for getting it into a standard form so you can answer all the parts of the question.

e.mccormick · Answer

One standard form is $y = a(x - h)^2 + k$  where a, h, and k are constants.  If you mathematically make it look like that, you can answer everything they ask.

e.mccormick · Answer

Have you done completing the square?

anonymous · Answer

oh i get it now thnx

e.mccormick · Answer

Kk.