Question

Choose the equation below whose axis of symmetry is x = 2.

y=x^2+4x+2
y=x^2-4
y=x^2-2
y=x^2-4x+2

Answer 1

What do you think the answer is?

Answer 2

I think its c but I don't know

Answer 3

I also think it is c. :o

Answer 4

the axis of symmetry is x=-b/2a

Answer 5

so if you plug in numbers into that formula which one do you think it is?

Answer 6

b? @GretaKnows

Answer 7

nope. the -4 is not b its c. so the axis of symmetry would be 0.

Answer 8

o that makes sense thanks @GretaKnows

Answer 9

so try d.
y=x^2-4x+2

-(-4)/2*1

Answer 10

--4 is +4 and 2*1 is 2. 4/2 is 2

Answer 11

so you think d is the answer? @GretaKnows

Answer 12

yep :)