Question

Identify the vertex for the graph of y = −2x2 + 8x − 1.

(−2, 7)

(2, 7)

(2, −9)

(−2, −9)

Answer 1

hmm same as before
\[-\frac{b}{2a}=-\frac{8}{2\times (-2)}=2\]

Answer 2

second coordinate is what you get when you replace \(x\) by \(2\)

Answer 3

kkk :)

Answer 4

the last one :)

Answer 5

if you need help with that part let me know but it should be straight forward

Answer 6

i mean the third one :)

Answer 7

ugh the second one :)

Answer 8

careful

Answer 9

yes, the second one

Answer 10

thanks .. please continue helping me :)

Answer 11

http://openstudy.com/study#/updates/5025697ce4b0d38989b7446b