I would like to seek help in finding a formula for following shape and behavior with controllability over behavior. with following features: y=f(x)
- y-> unity (or controllable constant) as x->0
- y->0 as x->inf
- Steep fall after x=constant
- Control over the average slope of the steep. for example, slope at y=0.5. (lover priority)
- Graph y=f(x) would be something like:
Thanks
SAM