`x^(2)=-16y`

Explanation

To solve the problem involving the parabola given by the equation \( x^2 = -16y \), we will follow these steps:

### Step 1: Identify the standard form of the parabola
The given equation \( x^2 = -16y \) can be compared with the standard form of a parabola that opens downwards, which is \( x^2 = -4py \).

### Step 2: Determine the value of \( p \)
From the standard form \( x^2 = -4py \), we can see that:
\[
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