Question

What is the axis of symmetry for the graph of y = 2x2 − 8x + 10?

Answer 1

. x = 2
b. x = −2
c. x = 4
d. x = −4

Answer 2

use the formula \[x=-\frac{ b }{ 2a }\] where ax^2+bx+c=0

Answer 3

in your case, a=2, b=-8 and c=10

Answer 4

isnt it -b/2a?

Answer 5

it is same

Answer 6

it doesnt matter where the minus is

Answer 7

i got 16/4

Answer 8

so x = 4

Answer 9

no:
\[-\frac{ b }{ 2a }=\frac{ -(-8) }{ 2*2 }=\frac{ 8 }{ 4 }=??\]

Answer 10

oh oops. i did 8 x 2

Answer 11

yeah

Answer 12

x=2

Answer 13

correct

Answer 14

TYVM!