The domain of the function is all real numbers. However, there is an interval where the function behaves differently. It appears that for x < -1, the function behaves like a step function, jumping up by 0.25 for every negative step. For x > 1, the function behaves like a step function again, jumping down by 0.25 for every positive step. For -1 <= x <= 1, the function behaves like a linear function, increasing by 0.25 for every unit increase in x.

