- anonymous

(FAN AND MEDAL) help please!!!
Graph each function using at least 3 points for each line. All graphs should be placed together on the same coordinate plane, so be sure to label each line

- katieb

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- anonymous

@ganeshie8 help me please!!!

- anonymous

- anonymous

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## More answers

- anonymous

- anonymous

help please!!!

- anonymous

@Vocaloid ???

- anonymous

- Vocaloid

what are the functions?

- anonymous

i dont know :/

- anonymous

- anonymous

- Vocaloid

is there any other information provided in the problem?

- anonymous

wait

- anonymous

k

- Vocaloid

please post everything here

- anonymous

Student Amber Ben Carter
Description Amber shared her photo with 3 people. They continued to share it, so the number of shares increases every day as shown by the function. Ben shared his post with 2 friends. Each of those friends shares with 3 more every day, so the number of shares triples every day. Carter shared his post with 10 friends, who each share with only 2 people each day.
Social Media Post Shares f(x) = 3(4)x
Day Number of Shares
0 2
1 6
2 18 Carter shared his post with 10 friends, who each share with only 2 people each day.

- anonymous

- anonymous

are you there? @Vocaloid ???

- Vocaloid

@Nnesha having a bit of trouble making sense of this problem, the information in the table, function, and word problem aren't really matching up

- Vocaloid

maybe take a screenshot?

- anonymous

ok give a sec

- Vocaloid

is there something you need from me?

- Vocaloid

please tag me in a separate question

- anonymous

##### 1 Attachment

- anonymous

you see the table @Vocaloid ???

- Vocaloid

alright, that makes it much more clear now, let's get started

- Vocaloid

we need to write functions for all three people (Amber, Ben, and Carter)
the problem already gives us Amber's function f(x) = 3(4)^x, let's remember that for later
now, the general form of an exponential function is f(x) = (starting number)(ratio)^x
let's find Ben's function. how many shares did he have on day 0?

- anonymous

ben 2(3)^x
carter 10(2)^x

- anonymous

right?

- phi

yes

- anonymous

so whats nexts? or thats the answer?

- phi

to graph them, they want you to find 3 points. They give you 3 points for Ben
You need points for the other 2

- phi

You answers 1 and 2
now you are doing part 3. graphing

- phi

*answered

- phi

I would use x=0 , 1 and 2
remember any number to the 0 power is 1
for amber (at x=0)
\[ 3\cdot 4^0= 3 \cdot 1 = 3\]
which means (0,3) is the first point for amber.
now do x=1 and x=2

- anonymous

i need to solve?

- anonymous

- phi

solve is not the word. Evaluate
which means, if you have a formula
and you "put in a number" for x, you get out a new number (the "y" value)
For amber, the formula is
f(x)= 3*4^x
I showed how to find f(0) (which means the y value when x is 0)
you replace x with 0, like this
f(0)= 3* 4^0
order of operations: do the exponent first.... 4^0 = 1 (special rule about 0, remember?)
then 3*1 which is 3
we get f(0)= 3
which means y is 3
and the (x,y) pair is (0,3)
now do that with x=1

- phi

Can you find the y value when x=1 for Amber?

- anonymous

y=4?

- phi

Let's see:
f(x)= 3*4^x
with x=1 we write
f(1) = 3* 4^1
is that 4?

- anonymous

no

- phi

remember order of operations
\[ 3 \cdot 4^1 \]
first do exponents. what is \(4^1\) ?

- phi

the "little 1" as an exponent as in 4^1 gives 4 (try it on a calculator)

- anonymous

its 4

- anonymous

- phi

yes, and f(1)= 3*4 = 12

- phi

so the points for amber are (0,3), (1,12)
now do x=2
can you do that ?

- anonymous

no, but let me try

- phi

write each step

- anonymous

f(x)= 3*2^x
with x=2 we write
f(1) = 3* 2^1
2^1= 2?

- phi

First, what equation do we use for amber?? (always good to start out with the correct one)

- anonymous

so, i did wrong?

- anonymous

@phi ???

- phi

you started with the wrong formula

- phi

please be careful. write down the formula for Amber.
then on the next line. *erase the x* and put 2 in its place.
what does the line look like after you do that?

- phi

look at the question. they give you the formula for Amber. Write it down here.

- anonymous

F(x)=3(4)^x?

- anonymous

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