Question

What are the amplitude, period, phase shift, and midline of f(x) = 2 sin(x + π) − 4?

A. amplitude: −4; period: 2 pi over 3; phase shift: x = −π; midline: y = 2

B. amplitude: 2; period: 2 pi over 3; phase shift: x = 2π; midline: y = 2

C. amplitude: 2; period: 2π; phase shift: x = −π; midline: y = −4

D. amplitude: −4; period: 2π; phase shift: x = 2π; midline: y = −4

Answer 1

D or A

Answer 2

Best answer so far!! hahaa thanks

Answer 3

dont get tht much '-'

Answer 4

@amistre64

Answer 5

ty

Answer 6

Well assuming that its per year it would be 3750 so it may be per month. Give me a sec

Answer 7

mk

Answer 8

you need help with your question, or with dealing with the poster?

Answer 9

i posted my own '-'

Answer 10

i see that, thank you :)

Answer 11

yw

Answer 12

bye

Answer 13

But i need help with the question

Answer 14

@amistre64

Answer 15

its all about the structure of the function .... the first number tells us about which property?

Answer 16

You mean the amplitude?

Answer 17

f(x) = 2 sin(x + π) − 4
^^
this number, it is the amplitude

that narrows the options right?

the last term tells us how far from y=0 it has been shifted

Answer 18

Okay. So let me make a graph so i can visualize real quick

Answer 19

So the amplitude is -4 when I look at the graph so that narrows it down to A and D

Answer 20

since the first number is a 2 .... the amplitude is 2

Answer 21

Oh.... so the amplitude is not the y-intercept?

Answer 22

no, the amplitude is the distance the wave moves from its midline

Answer 23

Ohhh okay that makes sense. And the midline is -4 so it has to be C