Respuesta :

sqdancefan

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Answer:

  D.  7

Step-by-step explanation:

The equation is ...

  x = a(y +1)² -3

For the point (x, y) = (4, 0), we have ...

  4 = a(0 -1)² -3

  7 = a . . . . . . . . . . . . add 3, simplify

The leading coefficient is 7.