You can put this solution on YOUR website! Since the vertex is at and (which means that when , then ), this means that the vertex is at the point (0,8). Now remember, the quadratic has the vertex (h,k). So this means that in this case and
Start with the general quadratic in vertex form
Plug in and
Subtract
So the quadratic equation which has the vertex at (0,8) is where "a" can be any number. For example, has the vertex at (0,8)