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 one year ago
Determine whether the graph of y = x^2 + 2x − 8 has a maximum or minimum point, then find the maximum or minimum value
 one year ago
Determine whether the graph of y = x^2 + 2x − 8 has a maximum or minimum point, then find the maximum or minimum value

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Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0@zaynahf can you please help me?

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1Just a minute, im getting my notes

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1Ok do you know which way the parabola is going? Up or down?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0i think up because the x^2 is positive

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0yeah it opens up

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1Right! So based on that, it tells you whether your vertex will have a maximum or minimum value. When it is opening up (a value is +), there will be a minimum because the vertex is on the bottom, the lowest point of the parabola. When it is opening down (a value is ), there will be a maximum value because the vertex is at the top, the highest point of the parabola. When naming the min/max, you only use the y value of the vertex. Example:dw:1357599979562:dw

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1One more thing: IF you know how to find a vertex when it is in standard form, you can do that, but personally i find it easier to first complete the square (make it into vertex form). If you need to know how to do either, let me know.

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0how do i put it in vertex form?

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1I'll give you an example one, if you dont mind

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1dw:1357600335929:dwdw:1357600792411:dw

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0oh that make sense they dont teach that in virtual school

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1I have a link if you want it

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1http://www.youtube.com/watch?v=aDHq_FoRxZQ Explains it better than i did

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0would the vertex be (0.33,10.33)?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.01,9 if i round?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0tried the formula by plugging in the numbers

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0wait this ask for the minimum value not the vertex

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1So if thats the vertex, then what would be the minimum?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0im lost i may have made terrible mistakes

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1Ok, where are you lost from?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0everything my brain just committed suicied i made mistakes a the beging all the way to the end

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1for finding the vertex?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0i... thats what i tried but i messed up completely i didnt even simplify right

zaynahf
 one year ago
Best ResponseYou've already chosen the best response.1where did youget up to?

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0i failed at even isolating the x terms( i've been up since 3 am) :(

Spartan_Of_Ares
 one year ago
Best ResponseYou've already chosen the best response.0ill be on later i have to go eat dinner
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