Very interesting, seems your remembering looks correct to me. x / (x+y+1) :: https://www.wolframalpha.com/input/?i=plot+x+%2F%28x+%2B+y+%2B+1%29%2C+x%3D0..10%

Very interesting, seems your remembering looks correct to me. x / (x+y+1) :: https://www.wolframalpha.com/input/?i=plot+x+%2F%28x+%2B+y+%2B+1%29%2C+x%3D0..10%2C+y%3D0..10 https://www.wolframalpha.com/input/?i=plot+x+%2F%28x+%2B+y+%... horrendous formula :: https://www.wolframalpha.com/input/?i=plot+%28%28x%2F%28x%2By%29%29+%2B+%28%281.96%5E2%2F2%29%2F%282*%28x%2By%29%29%29+-+%281.96%2F2%29*sqrt%28%28%28%28x%2F%28x%2By%29%29*%281-%28x%2F%28x%2By%29%29%29%29+%2B+%281.96%5E2%2F2%29%2F%284*%28x%2By%29%29%29%2F%28x%2By%29%29%29%2F%281+%2B+%281.96%5E2%2F2%29%2F%28x%2By%29%29%2C+x%3D0..10%2C+y%3D0..10 https://www.wolframalpha.com/input/?i=plot+%28%28x%2F%28x%2B... Much less prone to typos.