anonymous 4 years ago identify the direction of the opening of the parabola defined by

1. anonymous

|dw:1327788278020:dw|

2. anonymous

up down left or right?

3. anonymous

What is the sign on the coefficient of the x^2 term?

4. anonymous

what does that mean?

5. anonymous

Is x^2 negative or positive?

6. anonymous

negative

7. anonymous

Now look at this graph and determine which direction it opens: http://www.wolframalpha.com/input/?i=plot+x%5E2+and+-x%5E2

8. anonymous

down?

9. anonymous

Correct!

10. anonymous

identify the vertex of the parabola defined by |dw:1327789009375:dw|

11. anonymous

If we have$y = ax^2 + bx + c$The x-coordinate of the vertex can be found from $x = - {b \over 2a}$Then we can plug that value back into the function to get the y-coordinate.

12. anonymous

(-2,1) thanks

13. anonymous

which equation represents one of the steps of solving 6x^2-6x-12=0 by factoring? a. 6x+4=0 or x-3=o b.6x+2=0 or x-6=0 c.2x-2=0 or 3x+6=0 d.x-2=0 or x+1=0

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