Problem
The height of a golf ball in meters can be described by the equation $h=-4.9 t^{2}+21.7 t$, where $t$ is the number of seconds after it was hit. The intercepts for this function are $(0,0)$ and $(4.4,0)$. Part: 0 / 2 Part 1 of 2 (a) What is the meaning of $(0,0)$ ? It doesn't mean anything relevant since if the ball doesn't go anywhere, there's no flight to describe. The golf ball starts out zero meters off the ground. The ball is back on the ground when the flight is over. The golfer swung and missed. FAIL!
Solution
Step 1 ：The point $(0,0)$ represents the initial state of the golf ball. At time $t=0$ seconds (the moment the ball is hit), the height of the ball is $0$ meters (it starts from the ground).
