Question

how do you write a function that is an exponential decay with a horizontal asymptote of y = - 4 ?

Answer 1

@agent0smith

Answer 2

write a decaying function and drop it by 4 ....

Answer 3

Any exponential decay function will do, eg \[\Large f(x) = e^{-kx}\](the -k makes it decay, k is a positive number)

then subtract 4 from it \[\Large f(x) -4\]