Find a possible formula for the function graphed below. The $x$-intercept is marked with a point located at $(1, 0)$, and the $y$-intercept is marked with a point located at $(0, -0.25)$. The asymptotes are $y = -1$ and $x = 4$. Give your formula as a reduced rational function.

$f(x) =$ help (formulas)