carlenstar281
math question help



This Question is Closed

aajugdar
Best Response
You've already chosen the best response.
0
shoot

carlenstar281
Best Response
You've already chosen the best response.
0
is the line up or down for graphing
y = –2x² + 2

electrokid
Best Response
You've already chosen the best response.
1
1) this is a quadratic and cannot be a "line". It is a "curve"

carlenstar281
Best Response
You've already chosen the best response.
0
thats what i mean sorry is the curve up or down

electrokid
Best Response
You've already chosen the best response.
1
2) we then check the coefficient of the highest power of "x"

carlenstar281
Best Response
You've already chosen the best response.
0
i put it as down but im not sure

electrokid
Best Response
You've already chosen the best response.
1
it will first increase from infinity, then reach a maximum and then decrease

carlenstar281
Best Response
You've already chosen the best response.
0
okay i get that

carlenstar281
Best Response
You've already chosen the best response.
0
so does it look like this then

electrokid
Best Response
You've already chosen the best response.
1
dw:1364413141919:dw

carlenstar281
Best Response
You've already chosen the best response.
0
sorry i couldn't draw it

electrokid
Best Response
You've already chosen the best response.
1
looks like this. I cannot see your picture.

carlenstar281
Best Response
You've already chosen the best response.
0
oh sorry it was a pic that looked like the one you drew except the curve was under the x axis is that correct?

electrokid
Best Response
You've already chosen the best response.
1
yep. So, it first increases and then decreases.
did you study derivatives?

carlenstar281
Best Response
You've already chosen the best response.
0
yes and thank you :)

cahit
Best Response
You've already chosen the best response.
0
curve is under the x axis and downward.. at x = 0 it peak

cahit
Best Response
You've already chosen the best response.
0
at y =0 you can find x value and at x= 0 find value of y...

electrokid
Best Response
You've already chosen the best response.
1
if you had studied derivatives, this becomes way easier

carlenstar281
Best Response
You've already chosen the best response.
0
just a little bit and thank you again all for helping