Sasha used the time stamp on her video to determine that Al’s balloon landed after 4.5 seconds. From the competition data, she knows that Al’s balloon reached a height of 81 feet (27 yards). Your Task:Write the equation of a function that shows the height of Al’s balloon as a function of time. Then determine the velocity (average rate of change) of Al’s balloon just after it was launched. What points on the graph do we know? What information do we need to write an equation? How can we use our equation to determine other points on the graph? What points should we choose to get the best approximation of the velocity?