Deduce the direction in which the parabolas open.

a) [[$ y = x^2 - 3x +2 $]]

Answer: The parabola opens upwards downwards.

b) [[$ y = 2x(-x + 1) $]]

Answer: The parabola opens upwards downwards.

c) [[$ y = -4 +3x^2 $]]

Answer: The parabola opens upwards downwards.

d) [[$ y = (x - 5)(1 - 3x) $]]

Answer: The parabola opens upwards downwards.