The function f(x) takes a numerical input x and outputs a value that appears to be a scaled and offset version of the input. The function seems to be a simple, continuous, piecewise-linear function with two intervals. For inputs between -1 and 1, the function behaves linearly with a slope of 1 and an intercept of 0. For inputs outside of this range, the function behaves linearly with a slope of 2 and an intercept of -1.
