Question

abbiegarrison

Consider the following function:

y=1/4 cos (-1/4x)

Which of the following statements are true? Check all that apply

Answer choices:
A. The graph is symmetric to the y-axis.
B. The function decreases on the interval (0, 4π).
C. The frequency is StartFraction 1 Over 4 pi EndFraction.
D. The graph is compressed horizontally by a factor of One-fourth
E. The graph has x-intercepts at x = 2π and x = 6π.

Answer 1

PLEASE HELP ME I WILL GIVE MEDALS

Answer 2

The graph of a function is symmetric about the y-axis if you flip the graph across the y-axis and it's the same.
Any function in the form y = a*cos(bx + c) where c = 0 is symmetric about the y-axis.
You can graph it on desmos to see.

Answer 3

there are 3 correct answers. what is the other two?

Answer 4

go to desmos.com
graph the function.
Can you see when the function is decreasing?
You can also graph y = cosx and see the difference

Find the frequency.
Find the intercepts (given to you on the graph)

Answer 5

where is the frequency? it dont say

Answer 6

please help me idk what im doin

Answer 7

you have to figure that yourself.
for an equation y = cos(bx), the frequency is b

Answer 8

how can i figure it out if idk what im doin. and where do u see b on demsos

Answer 9

PLEASEEEEEE IM BEGGGGIINNN YOUUUUU

Answer 10

A,B, and E i guessed and got lucky

Answer 11

b is in the equation
I'm at school bro was eating lunch