(1) With the elevation of 0 m as the X axis and the highest point as the Y axis, you can set the functional relationship: y = ax2+b.

The relationship between coordinate points (-24,0) and (26, 1): A =-0.0 1 and B = 5.76: Y =-0.0 1x 2+5.76.

(2) When X=0, Y=5.76. So the maximum height of the ball is 5.76 meters.