carlenstar281
can you please help me :/
Delete
Share
This Question is Closed
Notamathgenius
Best Response
You've already chosen the best response.
0
Sure.
carlenstar281
Best Response
You've already chosen the best response.
0
i think i graphed the line right but i am not sure can you help please
Notamathgenius
Best Response
You've already chosen the best response.
0
@Muj_14 Help?
carlenstar281
Best Response
You've already chosen the best response.
0
yes
campbell_st
Best Response
You've already chosen the best response.
1
its a concave up parabola, symmetric about the y axis, cuts the y axis at - 4 and cuts the x axis at
\[x = \pm \frac{2}{\sqrt{3}}\]
carlenstar281
Best Response
You've already chosen the best response.
0
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
campbell_st
Best Response
You've already chosen the best response.
1
concave up... means
|dw:1364412258382:dw|
carlenstar281
Best Response
You've already chosen the best response.
0
ohhh its up are you sure
campbell_st
Best Response
You've already chosen the best response.
1
|dw:1364412296139:dw|
campbell_st
Best Response
You've already chosen the best response.
1
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.
carlenstar281
Best Response
You've already chosen the best response.
0
thans so much :)