Question

Someone please help with y=2^x?

Answer 1

Someone really really sweet helped me earlier today, but I dont think they are online.

Answer 2

the table is linear
because the equation for it is
\(y=2x\)

Answer 3

if you have the same ordered pairs as from the table

Answer 4

so then yes
the table matches the graph

Answer 5

and to find the 10th, just look at the y when x = 10

Answer 6

so wait this would be linear or exponential? I'm all confused again :/

Answer 7

okay wait the table when graphed is linear and then the equation I get using exponential regression, has to be - exponential?

Answer 8

Okay I found a website that does exponential regression using a table. & I think I have to do y=ab^x my numbers are a= 2.550657097 and b=1.259112119 are these right?

Answer 9

you don't need to do exponential regression for this because it's linear. The line of best fit is exactly

\[y=2x\]

Answer 10

I think I just thought it was expo because that's what the whole lessons about but yeah I mean it looks linear, but I still have to use expo regression (or constant ratio) to get an equation for this table and my rate of changes.

Answer 11

oh wait did you fill out that table or did they give it to you?

Answer 12

no I had to fill it in.

Answer 13

they gave me the first two and i did the rest

Answer 14

ok so each round DOUBLES

# of rounds | ppl receiving forward
1 2
2 4
3 8
4 16

Answer 15

That would make it exponential

Answer 16

oh dang really? I knew my table was wrong, but I didn't know exactly how.

Answer 17

okay well at least that is cleared up.

Answer 18

i'm going to redo this graph in google to see how it looks

Answer 19

ok. I think it should go smoothly from there

Answer 20

okay yeah it looks exponential now

Answer 21

ok

Answer 22

those rates of changes aren't going to be correct because the points changed

Answer 23

oh yeah sorry sorry I realized that as I posted them.

Answer 24

We did exponential earlier. Once you have the graph you can add the trendline

Answer 25

How did we get exponential? I remember just the equation being on the side there.

Answer 26

yeah you have to add the equation from the advanced options where you go to edit the chart

Answer 27

something like advanced edit I think

Answer 28

yeah that's it

Answer 29

okay so I have y=1e^(0.693x) how do I graph this over my original graph?

Answer 30

I think it graphs automatically

Answer 31

or I guess the line is just the same because I'm not seeing a new line just the one I had

Answer 32

yeah they'll be very close together for this one because you made up the points to match the function.

y = e^(0.693x) is basically the same as y = 2^x

Answer 33

okay yeah when I did advanced edit and all that stuff, the dot graph I had just changed to the plots being connected with a line, so I guess that they overlay eachother?

Answer 34

yeah that sounds right

Answer 35

how do I figure that out? Something with the 10th round?

Answer 36

@peachpi

Answer 37

my connection is so bad rn I don't know if I'm seeing replies

Answer 38

your equation is y = 2^x
50000 = 2^x
Solve for x

Answer 39

15?

Answer 40

yes

Answer 41

awesome! Again I appreciate your help so much. Can't thank you enough <3

Answer 42

you're welcome