Question

@Hero can you please help me.. i have the answer but i just want to make sure..

Which graph models the function f(x) = −2(3)x?

Answer 1

Would you like me to help?

Answer 2

Sure... Please

Answer 3

\(\Large f(x) = -2(3)^x \)

Answer 4

As x->infinity, f(x) -> -infinity
As x->-infinity, f(x) -> 0
At x = 0, f(x) = -2

Answer 5

Alright. So this equation is in the form of y=mx+b called slope intercept form. We know that the slope m here is... well first, can you clarify that the equation is as @aum has shown? And not f(x) = -2(3)x - rather f(x) = -2(3)^x?

Answer 6

okk,

Answer 7

So is it \[f(x) = -2 (3^x)\] Or \[f(x) = -2(3)x\]

Answer 8

I will take f(x)=-2(3x)

Answer 9

And would you like me to walk you through how to make an x|y plot so that you can graph any equation on your own in the future, starting with this problem as an example?

Answer 10

Sure...

Answer 11

@aum I think she is writing the problem wrong, would you agree it is f(x) = -2(3)^x?

Answer 12

Yes. It is -2(3)^x. lilystacy: You can answer if it is the first one or the second one that cosmicchaotic posted.

Answer 13

I mean yes please.

Answer 14

Okk...

Answer 15

Ok so with the problem \[f(x) = -2(3)^x\], which is I think what you are trying to show, we just need to assign x some values and then see what f(x) turns out.

I like to start with x = -1, 0, and 1: like so Is the first step. Are you with me so far @lilystacy ?

Answer 16

http://learn.flvs.net/webdav/assessment_images/educator_algebra2_v13/07_06/07_06_01a.jpg
http://learn.flvs.net/webdav/assessment_images/educator_algebra2_v13/07_06/07_06_01b.jpg

http://learn.flvs.net/webdav/assessment_images/educator_algebra2_v13/07_06/07_06_01c.jpg

http://learn.flvs.net/webdav/assessment_images/educator_algebra2_v13/07_06/07_06_01d.jpg

Answer 17

None of the links work. It is for registered, logged in accounts only.

Answer 18

Do no give your login/account info to anyone ever @lilystacy. Just for future reference.