Posted by **Tonya ** on Friday, November 4, 2011 at 5:47pm.

How can I tell what direction this parabola open up

-2x^2 +16x+24y-224=0

We just started this in class today do I need to change this into another format

- Algebra -
**MathMate**, Saturday, November 5, 2011 at 8:04am
The leading coefficient tells the story.

The leading coefficient of a polynomial is the coefficient (number) associated with the variable of the highest power, in this case, x².

If the leading coefficient (-2) is negative, it is *concave down*, i.e. it opens downwards. If the leading coefficient is positive, it is *concave up*.

An easy way to remember is the concavity follows the same direction along the y-axis as the leading coefficient. Positive => upwards, negative => downwards.

## Answer This Question

## Related Questions

- Precal - What is the standard form of this parabola: -2x^2+16x+24y-224=0 Please ...
- Algebra 2 - 16x^2+16y^2-16x+24y-3=0 How do I solve this?
- drbob222, math , algebra - Can you recheck this hopefully this time i did it ...
- HCS 320 - describe the national incident command structure i am supposed to do ...
- Math - 222x9 in distributive property format i got the answer its just i have to...
- algebra - In which direction does the parabola that is given by the equation ...
- Algebra - There are two solutions to | 16x - 5 | = 3. The greatest solution is ...
- accounting - Your general manager called you into his office to discuss an ...
- precal help - Find a Parabola with Vertex (3,1) Focus (4,1) Find the vertex of ...
- PRECAL - Find a Parabola with Vertex (3,1) Focus (4,1) Find the vertex of 4y^2+...

More Related Questions