1. The problem statement, all variables and given/known data The path of a baseball relative to the ground can be modelled by the function d(t)=-t2+8t+1 where d(t) represents the height of the ball in meters, and t represents time in seconds. a. Sketch a grpah of the function between 0 and 9 seconds. b. What is the speed of the ball when it hits the ground? 2. Relevant equations 3. The attempt at a solution I have no idea how to do this. It's in the first unit of my calculus class. I tried creating a table of values and then plotting the points but that didn't work. I also tried solving for d(0) through d(9) and then plotting the points but that gave me different answers then what others were getting. Any help on where I should start would be great, thanks.