Domain of the function is between [-128, 128] without any unexpected behavior observed.

Now, I'll calculate the slope and intercept to better approximate the function in code.

DIFFERENCE (X1, Y1) = (-128, 426.3984375)
DIFFERENCE (X2, Y2) = (128, -444.00006103515625)

SLOPE = (Y2 - Y1) / (X2 - X1)