Write an example of an equation for a exponential decay function

Answer 1

y = 3/4^x. If you graph this function it will start up the y-axis and quickly move down the y-axis.

Answer 2

f(x) = a b^x

If b < 1, it is exponential decay

a = initial value

Example:

f(x) = 1000 (0.70)^x

This function may represent a population that started at 1000, then decayed by 30% each year, where x is the number of years elapsed since it was 1000.