13 The height of a ball Doreen tossed into the air can be modeled by the function h x 4 9x 6x 5 where x is the time elapsed in seconds and h x is the height in meters The number 5 in the function represents 1 the initial height of the ball 2 the time at which the ball reaches the ground 3 the time at which the ball was at its highest point 4 the maximum height the ball attained when thrown in the air