First find the inverse function: y = -x^2 + 2 y - 2 = -x^2 2 - y = x^2 x = (2 - y)^0.5 Therefore inverse: y = (2 - x)^0.5 [x < 2] Then simply sub in four random values for x to give your answer (hint, for your x values, use 1, - 2, - 7 and - 14. These should yield nice integer values for y)
