What is the equation of the parabola? Vertex is at (0, 5) and points at (8, 13) and (-8, 13)
y = −x2 + 5
y = x2 + 5
y = x2 − 5
y = −x2 − 5

  none of the above

Step-by-step explanation:

The attached graph shows the closest candidate—the equation with vertex (0, 5) that opens upward. However, it needs vertical scaling to make it go through the given points.

  y = (1/8)x^2 +5

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)