Hi

1)  x = a(y+2)^2 , passes through (3/2,-1), 3/2 = a ,

2)  y = ax^2 - 1 , passes through (1,-2),  -2 = a - 1, a = -1, 

3) y = a(x+3)^2 -  1, passes through (3,-10/9), -10/9 = 36a - 1, a = -1/4 

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