Oh okay. It's quadratic. Sorry I didn't give you the answer you wanted before XD
But you still didn't include a question, lol.
OH! So 3m is the start of the height of the ball. It's essentially the y-intercept. But if it goes straight up, then... I still don't get what you're asking. Sorry mate. Include a question or you won't get an answer. You can write it in the "ask for details" th ing under your question.