Question

Choose the function whose graph is given by (attached below):

I don't think it is B. or D.?

Please explain answer. Thank you!

Answer 1

your right its not b nor d but i wont tell you if its a or c but i can guide you.

Answer 2

ok thank you

Answer 3

ok so look at your graph again and tell me where your y lands on with that top hill.

Answer 4

4

Answer 5

ok great thats part one so you now know y = 4cos automatically.

Answer 6

now at the right eend of the chart where does that line end and tell me what you notice beside it.

Answer 7

it doesn't go through 2 pi but 2 pi is where the graph ends

Answer 8

yep, thats correct and since its 2pi next to eachother that means multiply but you must do the reverse which means you have to divide, think you got it yet. :} if not just tell me.

Answer 9

wouldent that be a. with the fraction bar?

Answer 10

exactly :} great job.

Answer 11

http://www.wolframalpha.com/input/?i=y%3D4cos%28pi%2F2x%29

http://www.wolframalpha.com/input/?i=y%3D4cos%282x%29

I was trying to see it visually.

Answer 12

just curious how come the first link which would be a. doesent have the pi symbol but the second one does?

Answer 13

yeah those are great sites to use too by any chance are these flvs questions?

Answer 14

well ok ill explain that

Answer 15

flvs?

Answer 16

is that a virtual school?

Answer 17

yes, and actually what exactly do you mean byhow come the first link which would be a. doesent have the pi symbol but the second one does?

Answer 18

No I do a virtual school in Georgia used to live in Florida? Do you do virtual classes? For the links you will see the first graph (plot) and on the x-axis one have pi symbols and the other doesn't?

Answer 19

like on the first link (a.) the x-axis is spaced out by 2 4.... the second like has pi/2 then pi?

Answer 20

well on the x axis i see pi symbols but not on the y

Answer 21

oh ok I just was confused by that.

Answer 22

So basically the answer is A. y=4cos(pi/2x). Thank you very much for you help and time. Are you in Florida and do you do virtual school?

Answer 23

yes and yes

Answer 24

nice what grade If you don't mind me asking

Answer 25

and your welcome and i gtg its late and im in ninth technically 10th long story dont really have time for deatails. :} pass your class and have fun!

Answer 26

its nice having sites like this especially since we don't have teachers with us ok catch you later I became a fan! Have a great night!