Question 464304
Assuming
4x^2 + 16y + 16 = 0
then we have an equation.  Of course, it could equal anything.
.
You could divide through by 4 to reduce the coefficient.
x^2 + 4y + 4 = 0
.
Now get this into the slope-intercept form.
.
Subtract x^2 from both sides.
4y + 4 = -x^2
.
Subtract 4 from both sides.
4y = -x^2 - 4
.
Divide both sides by 4.
y = -(1/4)x^2 -4
.
{{{graph(500,500,-10,10,-10,10,-1/4*x*x-4)}}}