John has graciously decided that he will let you throw a water ballon at him if you can figure out the correct postion to throw the balloon from. Use your tools to the left to determine an appropriate starting point and to hit John with the balloon. The sliders indicate the values from vertex form of the equation of a parabola, f(x) = a(x-h)^2 + k. Drag the t slider that represents time to see if you have found an appropriate equation that will soak John!