1. Notamathgenius

Sure.

2. carlenstar281

i think i graphed the line right but i am not sure can you help please

3. Notamathgenius

@Muj_14 Help?

4. carlenstar281

yes

5. campbell_st

its a concave up parabola, symmetric about the y axis, cuts the y axis at - 4 and cuts the x axis at $x = \pm \frac{2}{\sqrt{3}}$

6. carlenstar281

yes i understand that but does the line point up or down I graphed it on my paper as being up but im not 100 % sure if that's correct

7. campbell_st

concave up... means |dw:1364412258382:dw|

8. carlenstar281

ohhh its up are you sure

9. campbell_st

|dw:1364412296139:dw|

10. campbell_st

The general from of a parabola is $y = ax^2 + bx + c$ the value of a determines the concavity if a is negative the parabola is concave down is a is positive its concave up. in your question a = 3 which is positive, so concave up.

11. carlenstar281

thans so much :)