determine if this equation represents exponential growth or decay

Question

katherinesmith · Answer

$$y = (0.9)^{x}$$

loser66 · Answer

just take few value of x , you can see whether it is up or down. for example:
x =1 --> y = 0.9
x =2 --> y = (0.9)^2 = 0.81
x =3 --> y = (0.9)^3 = 0.729 
 you see!! x increases, y decreases--> so the function is.... ????

katherinesmith · Answer

decay?

loser66 · Answer

Yup

katherinesmith · Answer

thank you! would you be willing to stick around and help me with others

loser66 · Answer

In general, to exponential equation, the base >1 --> function grow the base <1 --> function decay. your base 0.9<1 --> decay

katherinesmith · Answer

The parent function of the following graph is 
$$f(x) = (\frac{ 1 }{ 2 })^{x}$$

katherinesmith · Answer

what is the equation of the following graph?

loser66 · Answer

hey, close this post, open a new one

loser66 · Answer

|dw:1377740366845:dw|