Question

Which of the following is the equation of the axis of symmetry for the function?
y = x2 -4x + 8

a: y = 2x
b: x = 2
c: y = -2
d: x = -4

Answer 1

what do you think?

Answer 2

c

Answer 3

the formula is \(\dfrac{-b}{2a}\)

Answer 4

in your function, a = 1 , b = -4
\(\dfrac{-(-4)}{2*1}=\dfrac{4}{2}=2\)

Answer 5

so B

Answer 6

ok thanks

Answer 7

yw