Which system models the height of the tennis ball and the height of the dog's mouth over time?

h = 4.5t + 18 and h = -16t2 + 1.5t + 21

h = 18t + 4.5 and h =-16t2 + 21t + 1.5

h = -16t2 + 18t + 4.5 and h = -16t2 + 21t + 1.5

Laurie throws a tennis ball toward her dog from a height of 4.5 ft. The initial vertical velocity of the ball is 18 ft/s. At the same time as Laurie throws the ball, her dog jumps with an initial vertical velocity of 21 ft/s. When the dog jumps, its mouth is 1.5 ft above the ground.

Question

Which system models the height of the tennis ball and the height of the dog's mouth over time?

h = 4.5t + 18 and h = -16t2 + 1.5t + 21

h = 18t + 4.5 and h =-16t2 + 21t + 1.5

h = -16t2 + 18t + 4.5 and h = -16t2 + 21t + 1.5

Laurie throws a tennis ball toward her dog from a height of 4.5 ft. The initial vertical velocity of the ball is 18 ft/s. At the same time as Laurie throws the ball, her dog jumps with an initial vertical velocity of 21 ft/s. When the dog jumps, its mouth is 1.5 ft above the ground.