Which is a stretch of an exponential decay function?

f(x)  =  

f(x)  =  

f(x)  =  

f(x)  =  

I would assume all of them since they are all the same, here is an example of exponential decay : Write an equation for the following statement, Merida has has $200,000 in a stock market which is decreasing by 1% annually.

f(x) = 200000(.99)^2

Comment if you need me to explain why this is the equation

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.