The graph shows the height y, in feet, of a balloon that is launched from a platform 13.5 feet high, as a quadratic function of x, the time in seconds. What is the domain of this function in this situation? 1. 13.5 ≤ y ≤ 43.5 2. 0 ≤ x ≤ 54 3. 14.5 ≤ x ≤ 54 4. 0 ≤ y ≤ 43.5