Question

Choose the equation below whose axis of symmetry is x = 0.

y = x2 + 2x

y = x2 − 16x + 58

y = x2 + 2

y = x2 − 4x + 2

Answer 1

@ooops

Answer 2

hi

Answer 3

find vertex, what do you get?

Answer 4

for which 1?

Answer 5

find all the vertexes, the first one: ?
the second one:?
3rd?
4th ?

Answer 6

-b/2a
1.1
2.8
3.1
4.2

Answer 7

...?

Answer 8

sure?

Answer 9

the first one -b/2a = -1 for x, then y = -1 for y, right?

Answer 10

oh okay

Answer 11

I believe the answer is x^2-4x+2

Answer 12

Actually maybe not

Answer 13

nope, the 3rd one, if x =0, then y = 2 the vertex of a parabola is on the y -axis, it means the y axis is symmetry. y axis implies x =0, got me?

Answer 14

okay thanks

Answer 15

Yeah, it's the third one

Answer 16

bout this one?A football is kicked toward the goal. The height of the ball is modeled by the function h(t) = -16t2 + 64t where t equals the time in seconds and h(t) represents the height of the ball at time t seconds. What is the axis of symmetry and what does it represent?

t = 2; it takes 2 seconds to reach the maximum height and 2 seconds to fall back to the ground

t = 2; it takes 2 seconds to reach the maximum height and 4 seconds to fall back to the ground

t = 4; it takes 4 seconds to reach the maximum height and 4 seconds to fall back to the ground

t = 4; it takes 4 seconds to reach the maximum height and 8 seconds to fall back to the ground

Answer 17

consider the first one, (-1,-1)

Answer 18

I am sleepy, let me sleep awhile. hehehe, let Hapreet helps you

Answer 19

lol okay

Answer 20

have a nice nap xD

Answer 21

again, find vertex

Answer 22

16=a 64=b

Answer 23

32/-64 right?

Answer 24

aka -.5

Answer 25

-b/2a, how you get those numbers?

Answer 26

oops did it backwards

Answer 27

-64/32

Answer 28

-64/-32

Answer 29

oh ok

Answer 30

so the vertex is 2

Answer 31

so A?