If the Quasilinear equation of parabola y = ax & # is Y-2 = 0, then the value of a is

If the Quasilinear equation of parabola y = ax & # is Y-2 = 0, then the value of a is

The standard equation of the parabola is X & # 178; = 1 / a · y. The quasilinear equation is y = 2. It can be judged that the opening of the parabola is downward, a is negative, and | 1 / a | = 2p. P is the focal distance, and the focal coordinates (0, - 2) | P = 4. Then | 1 / a | = 8, a = - 1 / 8 can be obtained
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